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<!--XBRL Document Created with Wdesk from Workiva-->
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    <link:label id="lab_cls_AccumulatedOtherComprehensiveIncomeRollforwardRollForward_label_en-US" xlink:label="lab_cls_AccumulatedOtherComprehensiveIncomeRollforwardRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated Other Comprehensive Income Rollforward [Roll Forward]</link:label>
    <link:label id="lab_cls_AccumulatedOtherComprehensiveIncomeRollforwardRollForward_documentation_en-US" xlink:label="lab_cls_AccumulatedOtherComprehensiveIncomeRollforwardRollForward" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated Other Comprehensive Income Rollforward [Roll Forward]</link:label>
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    <link:label id="lab_ifrs-full_LeaseLiabilitiesMember_973f2dd0-119f-45d1-843b-128c8163aef1_terseLabel_en-US" xlink:label="lab_ifrs-full_LeaseLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease obligations</link:label>
    <link:label id="lab_ifrs-full_LeaseLiabilitiesMember_label_en-US" xlink:label="lab_ifrs-full_LeaseLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease liabilities [member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LeaseLiabilitiesMember" xlink:to="lab_ifrs-full_LeaseLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_LettersOfCreditMaximumSubLimitAmount_a785f0bc-19d3-4e90-8ede-3555546653bf_terseLabel_en-US" xlink:label="lab_cls_LettersOfCreditMaximumSubLimitAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Letters of credit sub-limit</link:label>
    <link:label id="lab_cls_LettersOfCreditMaximumSubLimitAmount_label_en-US" xlink:label="lab_cls_LettersOfCreditMaximumSubLimitAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Letters Of Credit, Maximum Sub-Limit, Amount</link:label>
    <link:label id="lab_cls_LettersOfCreditMaximumSubLimitAmount_documentation_en-US" xlink:label="lab_cls_LettersOfCreditMaximumSubLimitAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Letters Of Credit, Maximum Sub-Limit, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_LettersOfCreditMaximumSubLimitAmount" xlink:href="cls-20211231.xsd#cls_LettersOfCreditMaximumSubLimitAmount"/>
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    <link:label id="lab_cls_GeneralInformationAboutFinancialStatementsAbstract_39bda67f-cd35-4ba5-9b64-cd7e0c574dd9_terseLabel_en-US" xlink:label="lab_cls_GeneralInformationAboutFinancialStatementsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General Information About Financial Statements [Abstract]</link:label>
    <link:label id="lab_cls_GeneralInformationAboutFinancialStatementsAbstract_label_en-US" xlink:label="lab_cls_GeneralInformationAboutFinancialStatementsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General Information About Financial Statements [Abstract]</link:label>
    <link:label id="lab_cls_GeneralInformationAboutFinancialStatementsAbstract_documentation_en-US" xlink:label="lab_cls_GeneralInformationAboutFinancialStatementsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General Information About Financial Statements [Abstract]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_GeneralInformationAboutFinancialStatementsAbstract" xlink:to="lab_cls_GeneralInformationAboutFinancialStatementsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_CashAcquiredInConnectionWithAcquisitionAsOfAcquisitionDate_d544055b-e77b-4a25-8892-52eedc35c9ab_terseLabel_en-US" xlink:label="lab_cls_CashAcquiredInConnectionWithAcquisitionAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash acquired</link:label>
    <link:label id="lab_cls_CashAcquiredInConnectionWithAcquisitionAsOfAcquisitionDate_label_en-US" xlink:label="lab_cls_CashAcquiredInConnectionWithAcquisitionAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Acquired In Connection With Acquisition As Of Acquisition Date</link:label>
    <link:label id="lab_cls_CashAcquiredInConnectionWithAcquisitionAsOfAcquisitionDate_documentation_en-US" xlink:label="lab_cls_CashAcquiredInConnectionWithAcquisitionAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Acquired In Connection With Acquisition As Of Acquisition Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_CashAcquiredInConnectionWithAcquisitionAsOfAcquisitionDate" xlink:href="cls-20211231.xsd#cls_CashAcquiredInConnectionWithAcquisitionAsOfAcquisitionDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_CashAcquiredInConnectionWithAcquisitionAsOfAcquisitionDate" xlink:to="lab_cls_CashAcquiredInConnectionWithAcquisitionAsOfAcquisitionDate" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill_48e4ddca-14ea-4deb-8630-0b800b017e48_terseLabel_en-US" xlink:label="lab_cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets and goodwill, among countries that exceeded 10% (as a percentage of total)</link:label>
    <link:label id="lab_cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill_label_en-US" xlink:label="lab_cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage Of Entities Intangible Assets And Goodwill</link:label>
    <link:label id="lab_cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill_documentation_en-US" xlink:label="lab_cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage Of Entities Intangible Assets And Goodwill</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill" xlink:href="cls-20211231.xsd#cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill" xlink:to="lab_cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_CreditFacility1Domain_18d9313e-132e-4d56-8708-d640b361c37d_terseLabel_en-US" xlink:label="lab_cls_CreditFacility1Domain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility [Domain]</link:label>
    <link:label id="lab_cls_CreditFacility1Domain_label_en-US" xlink:label="lab_cls_CreditFacility1Domain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility1 [Domain]</link:label>
    <link:label id="lab_cls_CreditFacility1Domain_documentation_en-US" xlink:label="lab_cls_CreditFacility1Domain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Credit Facility1 [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_CreditFacility1Domain" xlink:href="cls-20211231.xsd#cls_CreditFacility1Domain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_CreditFacility1Domain" xlink:to="lab_cls_CreditFacility1Domain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_WarrantyProvisionMember_1e8e305f-362f-47b8-9aa9-b1e259949a32_terseLabel_en-US" xlink:label="lab_ifrs-full_WarrantyProvisionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Warranty</link:label>
    <link:label id="lab_ifrs-full_WarrantyProvisionMember_label_en-US" xlink:label="lab_ifrs-full_WarrantyProvisionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Warranty provision [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WarrantyProvisionMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_WarrantyProvisionMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_WarrantyProvisionMember" xlink:to="lab_ifrs-full_WarrantyProvisionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfOtherProvisionsExplanatory_72f2066b-b6d5-4ae7-a1bd-32e481813a37_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherProvisionsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Changes in Provisions</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfOtherProvisionsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherProvisionsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of other provisions [text block]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfOtherProvisionsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_83427cff-b824-4f3c-bf9c-b7c7dd60479b_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about property, plant and equipment [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about property, plant and equipment [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan_9abd6fea-04b3-4509-8f66-2013efcb9ad4_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pension and non-pension post-employment benefit obligations</link:label>
    <link:label id="lab_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan_c1656607-5f69-4ef7-98f0-57cb94fbc41f_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pension and non-pension post-employment benefit obligations</link:label>
    <link:label id="lab_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan_label_en-US" xlink:label="lab_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current net defined benefit liability</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:to="lab_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_SecurityExchangeName_75148f62-5813-46f1-be8e-efee2db27f8f_terseLabel_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Security Exchange Name</link:label>
    <link:label id="lab_dei_SecurityExchangeName_label_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Security Exchange Name</link:label>
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    <link:label id="lab_ifrs-full_SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract_e3b602d5-8b15-4511-9ed5-a664e2a40540_terseLabel_en-US" xlink:label="lab_ifrs-full_SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subclassifications of assets, liabilities and equities [abstract]</link:label>
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    <link:label id="lab_cls_InventoryContractPurchaseMember_documentation_en-US" xlink:label="lab_cls_InventoryContractPurchaseMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventory Contract Purchase</link:label>
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    <link:label id="lab_ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets_4d1d900e-c31b-4f9c-9481-9ec0b7ed45a4_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on disposals of non-current assets</link:label>
    <link:label id="lab_ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets_label_en-US" xlink:label="lab_ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on disposals of non-current assets</link:label>
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    <link:label id="lab_cls_DeferredTaxRelatingToOtherDeferredTaxAssets_fc2d4700-1ef6-4278-9883-0d768a30b702_terseLabel_en-US" xlink:label="lab_cls_DeferredTaxRelatingToOtherDeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_cls_DeferredTaxRelatingToOtherDeferredTaxAssets_label_en-US" xlink:label="lab_cls_DeferredTaxRelatingToOtherDeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Relating To Other, Deferred Tax Assets</link:label>
    <link:label id="lab_cls_DeferredTaxRelatingToOtherDeferredTaxAssets_documentation_en-US" xlink:label="lab_cls_DeferredTaxRelatingToOtherDeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Relating To Other, Deferred Tax Assets</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemExplanatory_b5e758a5-980f-4641-b356-27bd524b18ec_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated Other Comprehensive Loss, Net of Tax</link:label>
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    <link:label id="lab_cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset_ce01dabd-2f41-4590-bbe1-e8e2d96d0d78_negatedTerseLabel_en-US" xlink:label="lab_cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Benefit payments from employer</link:label>
    <link:label id="lab_cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset_a6571f7e-3a35-4ceb-be98-5d6f9ad9a28b_negatedLabel_en-US" xlink:label="lab_cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Benefit payments from employer</link:label>
    <link:label id="lab_cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset_label_en-US" xlink:label="lab_cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments From Employer, Net Defined Benefit Liability (Asset)</link:label>
    <link:label id="lab_cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset_documentation_en-US" xlink:label="lab_cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments From Employer, Net Defined Benefit Liability (Asset)</link:label>
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    <link:label id="lab_ifrs-full_DefinedBenefitObligationAtPresentValue_9d77f6d4-14f5-42b2-aec5-8df7973a2549_negatedLabel_en-US" xlink:label="lab_ifrs-full_DefinedBenefitObligationAtPresentValue" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued benefit obligations, end of year</link:label>
    <link:label id="lab_ifrs-full_DefinedBenefitObligationAtPresentValue_label_en-US" xlink:label="lab_ifrs-full_DefinedBenefitObligationAtPresentValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined benefit obligation, at present value</link:label>
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    <link:label id="lab_cls_NewCreditFacilityMember_b1e08e48-cbd3-461b-91b7-bd9710882a06_terseLabel_en-US" xlink:label="lab_cls_NewCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New credit facility</link:label>
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    <link:label id="lab_cls_NewCreditFacilityMember_documentation_en-US" xlink:label="lab_cls_NewCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New Credit Facility [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_NewCreditFacilityMember" xlink:href="cls-20211231.xsd#cls_NewCreditFacilityMember"/>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset_050e9bd2-57e9-45e3-8394-b3d9e0648949_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign currency exchange rate changes and other</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset_44dd73a0-d9ab-4a5c-8761-2d0bff934f32_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign currency exchange rate changes and other</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in net defined benefit liability (asset) resulting from changes in foreign exchange rates, net defined benefit liability (asset)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset"/>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory_1f9089e9-54c1-42c2-a190-ae2584dd29d9_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for property, plant and equipment [text block]</link:label>
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    <link:label id="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_960260b7-25fb-4d2b-b270-ff9634e9b705_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease payments</link:label>
    <link:label id="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_label_en-US" xlink:label="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments of lease liabilities, classified as financing activities</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseInWorkingCapital_359fa430-24ac-4cbf-828d-a1d36ddd9891_negatedTotalLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-cash working capital changes</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInWorkingCapital_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in working capital</link:label>
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    <link:label id="lab_ifrs-full_ClassesOfShareCapitalMember_6687780c-382c-4047-901e-8675acede2cb_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfShareCapitalMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share capital</link:label>
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    <link:label id="lab_cls_DerecognitionOfFinancialAssetsByTypeOfTransferDomain_71a9af77-d343-4136-80e7-18a3f1892780_terseLabel_en-US" xlink:label="lab_cls_DerecognitionOfFinancialAssetsByTypeOfTransferDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derecognition Of Financial Assets By Type Of Transfer [Domain]</link:label>
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    <link:label id="lab_ifrs-full_IssuedCapital_e45c7885-8814-4677-9dd2-559472123b8e_terseLabel_en-US" xlink:label="lab_ifrs-full_IssuedCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital stock</link:label>
    <link:label id="lab_ifrs-full_IssuedCapital_label_en-US" xlink:label="lab_ifrs-full_IssuedCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued capital</link:label>
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    <link:label id="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis_ce4d538c-d1a1-46ad-a37e-db0242d36df7_terseLabel_en-US" xlink:label="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Margin for borrowings (percent)</link:label>
    <link:label id="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis_label_en-US" xlink:label="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, adjustment to interest rate basis</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_BorrowingsAdjustmentToInterestRateBasis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:to="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_CondensedCashFlowStatementTable_a9198dd1-bee5-42f9-90a0-ff1e3babcf49_terseLabel_en-US" xlink:label="lab_srt_CondensedCashFlowStatementTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement Of Cash Flows [Table]</link:label>
    <link:label id="lab_srt_CondensedCashFlowStatementTable_label_en-US" xlink:label="lab_srt_CondensedCashFlowStatementTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Condensed Cash Flow Statement [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedCashFlowStatementTable" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CondensedCashFlowStatementTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_CondensedCashFlowStatementTable" xlink:to="lab_srt_CondensedCashFlowStatementTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentLiabilities_467bcee8-5a50-4e4c-a3e6-ec33fa3f28e5_totalLabel_en-US" xlink:label="lab_ifrs-full_CurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total current liabilities</link:label>
    <link:label id="lab_ifrs-full_CurrentLiabilities_label_en-US" xlink:label="lab_ifrs-full_CurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CurrentLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentLiabilities" xlink:to="lab_ifrs-full_CurrentLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_CurrentTaxLiabilitiesMember_56498f1e-fe8e-43c3-b745-0ff6ef71afc0_terseLabel_en-US" xlink:label="lab_cls_CurrentTaxLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes and value-added taxes payable</link:label>
    <link:label id="lab_cls_CurrentTaxLiabilitiesMember_label_en-US" xlink:label="lab_cls_CurrentTaxLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Tax Liabilities [Member]</link:label>
    <link:label id="lab_cls_CurrentTaxLiabilitiesMember_documentation_en-US" xlink:label="lab_cls_CurrentTaxLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Tax Liabilities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_CurrentTaxLiabilitiesMember" xlink:href="cls-20211231.xsd#cls_CurrentTaxLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_CurrentTaxLiabilitiesMember" xlink:to="lab_cls_CurrentTaxLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_DisclosureOfCurrentInventoryTableTextBlock_48d59ead-229d-49b3-818e-3b6fd7aa7f0c_terseLabel_en-US" xlink:label="lab_cls_DisclosureOfCurrentInventoryTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Current Inventory</link:label>
    <link:label id="lab_cls_DisclosureOfCurrentInventoryTableTextBlock_label_en-US" xlink:label="lab_cls_DisclosureOfCurrentInventoryTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Current Inventory [Table Text Block]</link:label>
    <link:label id="lab_cls_DisclosureOfCurrentInventoryTableTextBlock_documentation_en-US" xlink:label="lab_cls_DisclosureOfCurrentInventoryTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Current Inventory</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_DisclosureOfCurrentInventoryTableTextBlock" xlink:href="cls-20211231.xsd#cls_DisclosureOfCurrentInventoryTableTextBlock"/>
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    <link:label id="lab_ifrs-full_FinancialAssets_2125c0e2-b39a-4718-9513-ddb8e6d4428c_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_ifrs-full_FinancialAssets_label_en-US" xlink:label="lab_ifrs-full_FinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FinancialAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialAssets" xlink:to="lab_ifrs-full_FinancialAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory_7cf44716-2b96-4d6c-bc02-d45062109191_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings Under the Revolving Facility and Term Loan and Lease Obligations</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about borrowings [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LocalPhoneNumber_75de75d8-f8c8-4138-9377-9fbd987473c0_terseLabel_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Local Phone Number</link:label>
    <link:label id="lab_dei_LocalPhoneNumber_label_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Local Phone Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LocalPhoneNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LocalPhoneNumber" xlink:to="lab_dei_LocalPhoneNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_623323a9-366f-4440-ba46-ae2cbb11d904_terseLabel_en-US" xlink:label="lab_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of changes in property, plant and equipment [abstract]</link:label>
    <link:label id="lab_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_label_en-US" xlink:label="lab_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of changes in property, plant and equipment [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" xlink:to="lab_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_BaseRateMember_379d5397-8737-445d-84e5-360cf2460dc9_terseLabel_en-US" xlink:label="lab_cls_BaseRateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Base Rate</link:label>
    <link:label id="lab_cls_BaseRateMember_label_en-US" xlink:label="lab_cls_BaseRateMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Base Rate [Member]</link:label>
    <link:label id="lab_cls_BaseRateMember_documentation_en-US" xlink:label="lab_cls_BaseRateMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Base Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_BaseRateMember" xlink:href="cls-20211231.xsd#cls_BaseRateMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_BaseRateMember" xlink:to="lab_cls_BaseRateMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_IntangibleAssetsAbstract_9f9543e1-c5c9-4aca-bf9d-a251085eaf9d_terseLabel_en-US" xlink:label="lab_cls_IntangibleAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible Assets [Abstract]</link:label>
    <link:label id="lab_cls_IntangibleAssetsAbstract_label_en-US" xlink:label="lab_cls_IntangibleAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible Assets [Abstract]</link:label>
    <link:label id="lab_cls_IntangibleAssetsAbstract_documentation_en-US" xlink:label="lab_cls_IntangibleAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible Assets [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_IntangibleAssetsAbstract" xlink:href="cls-20211231.xsd#cls_IntangibleAssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_IntangibleAssetsAbstract" xlink:to="lab_cls_IntangibleAssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NewIFRSsMember_c7f13886-24ba-4780-a41e-00af408dc306_terseLabel_en-US" xlink:label="lab_ifrs-full_NewIFRSsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New IFRSs</link:label>
    <link:label id="lab_ifrs-full_NewIFRSsMember_label_en-US" xlink:label="lab_ifrs-full_NewIFRSsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New IFRSs [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NewIFRSsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_NewIFRSsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NewIFRSsMember" xlink:to="lab_ifrs-full_NewIFRSsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_CurrencyAxis_6eed4c79-9c29-4428-99e3-c5c0820bb768_terseLabel_en-US" xlink:label="lab_srt_CurrencyAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency [Axis]</link:label>
    <link:label id="lab_srt_CurrencyAxis_label_en-US" xlink:label="lab_srt_CurrencyAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CurrencyAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_CurrencyAxis" xlink:to="lab_srt_CurrencyAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_DefinedContributionPlanMember_e4de009f-04b0-4c01-8a46-d7f500647d23_terseLabel_en-US" xlink:label="lab_cls_DefinedContributionPlanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Contribution Plan</link:label>
    <link:label id="lab_cls_DefinedContributionPlanMember_label_en-US" xlink:label="lab_cls_DefinedContributionPlanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Contribution Plan [Member]</link:label>
    <link:label id="lab_cls_DefinedContributionPlanMember_documentation_en-US" xlink:label="lab_cls_DefinedContributionPlanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Contribution Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_DefinedContributionPlanMember" xlink:href="cls-20211231.xsd#cls_DefinedContributionPlanMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_DefinedContributionPlanMember" xlink:to="lab_cls_DefinedContributionPlanMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_4b8315c2-cc3c-473f-b9ae-3446074c546b_terseLabel_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">SBC (including DSUs and RSUs to eligible directors)</link:label>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_label_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Key management personnel compensation, share-based payment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:to="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_ForwardCurrencyAndForwardSwapContractsMember_26eb3449-4e0e-4a3d-87c2-b6d14774f016_terseLabel_en-US" xlink:label="lab_cls_ForwardCurrencyAndForwardSwapContractsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Forward Currency and Forward Swap Contracts</link:label>
    <link:label id="lab_cls_ForwardCurrencyAndForwardSwapContractsMember_label_en-US" xlink:label="lab_cls_ForwardCurrencyAndForwardSwapContractsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Forward Currency and Forward Swap Contracts [Member]</link:label>
    <link:label id="lab_cls_ForwardCurrencyAndForwardSwapContractsMember_documentation_en-US" xlink:label="lab_cls_ForwardCurrencyAndForwardSwapContractsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Forward Currency and Forward Swap Contracts</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_ForwardCurrencyAndForwardSwapContractsMember" xlink:href="cls-20211231.xsd#cls_ForwardCurrencyAndForwardSwapContractsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_ForwardCurrencyAndForwardSwapContractsMember" xlink:to="lab_cls_ForwardCurrencyAndForwardSwapContractsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_country_CN_a15071df-86f7-4009-a6c4-d92736625102_terseLabel_en-US" xlink:label="lab_country_CN" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">China</link:label>
    <link:label id="lab_country_CN_label_en-US" xlink:label="lab_country_CN" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CHINA</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_CN"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_CN" xlink:to="lab_country_CN" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesAmountDerecognized1_1b74521f-00b1-4f84-9b80-aaa0a6861162_terseLabel_en-US" xlink:label="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesAmountDerecognized1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts receivable sold during period</link:label>
    <link:label id="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesAmountDerecognized1_label_en-US" xlink:label="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesAmountDerecognized1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfer Of Financial Assets Accounted For As Sales, Amount Derecognized1</link:label>
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    <link:label id="lab_cls_RightOfUseAssetsWriteDownOfAssetsAndLeaseTerminations_d9ddd63d-df38-4d4e-9814-edee02dd0abb_negatedLabel_en-US" xlink:label="lab_cls_RightOfUseAssetsWriteDownOfAssetsAndLeaseTerminations" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Write-down of assets and lease terminations</link:label>
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    <link:label id="lab_cls_RightOfUseAssetsWriteDownOfAssetsAndLeaseTerminations_documentation_en-US" xlink:label="lab_cls_RightOfUseAssetsWriteDownOfAssetsAndLeaseTerminations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right-Of-Use Assets, Write Down Of Assets And Lease Terminations</link:label>
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    <link:label id="lab_cls_BusinessCombinationPurchasePriceAdjustment_b5ac34f7-ad54-4034-96c5-128604f38e95_terseLabel_en-US" xlink:label="lab_cls_BusinessCombinationPurchasePriceAdjustment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business combination, purchase price adjustment</link:label>
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    <link:label id="lab_cls_BusinessCombinationPurchasePriceAdjustment_documentation_en-US" xlink:label="lab_cls_BusinessCombinationPurchasePriceAdjustment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Combination, Purchase Price Adjustment</link:label>
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    <link:label id="lab_cls_UsefulLivesIntangibleAssetsAcquiredThroughBusinessCombinationOtherThanGoodwill_e0586aeb-49fd-47ac-aa16-188efec2282b_terseLabel_en-US" xlink:label="lab_cls_UsefulLivesIntangibleAssetsAcquiredThroughBusinessCombinationOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer intangible assets acquired, useful life</link:label>
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    <link:label id="lab_cls_LeaseLiabilityUnderIFRS16_8a8bba27-c59d-4012-9cbb-69c6b75f0a48_verboseLabel_en-US" xlink:label="lab_cls_LeaseLiabilityUnderIFRS16" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease obligations</link:label>
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    <link:label id="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions2019_fa96297e-ec53-4afe-8e32-e4a9214f731c_terseLabel_en-US" xlink:label="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions2019" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise price of outstanding share options (in dollars per share)</link:label>
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    <link:label id="lab_dei_EntityWellKnownSeasonedIssuer_fddea40b-e03c-42e5-8177-3d86bacba17f_terseLabel_en-US" xlink:label="lab_dei_EntityWellKnownSeasonedIssuer" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Well-known Seasoned Issuer</link:label>
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    <link:label id="lab_cls_PurchaseOrdersIssuedForAcquisitionOfInventory_293d3861-3168-43be-bda9-2f3b78f2b149_terseLabel_en-US" xlink:label="lab_cls_PurchaseOrdersIssuedForAcquisitionOfInventory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase orders issued for acquisition of inventory</link:label>
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    <link:label id="lab_cls_RightOfUseAssetForeignExchangeAndOther_91367b82-3dec-48c8-94d6-ab0051f0e78d_terseLabel_en-US" xlink:label="lab_cls_RightOfUseAssetForeignExchangeAndOther" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign exchange and other</link:label>
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    <link:label id="lab_ifrs-full_AdditionalInformationAboutSharebasedPaymentArrangements_0cf97fbb-1ebe-4c48-977d-116b5d8c54c4_terseLabel_en-US" xlink:label="lab_ifrs-full_AdditionalInformationAboutSharebasedPaymentArrangements" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional information about share-based payment arrangements</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable_83837506-4ab6-4ea1-9c6f-f3b1d064c290_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of range of exercise prices of outstanding share options [table]</link:label>
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    <link:label id="lab_cls_DefinedBenefitPlanUltimateHealthCareCostTrendRate2_f32f0c04-344b-40dc-8b7a-9a90cc47c67e_terseLabel_en-US" xlink:label="lab_cls_DefinedBenefitPlanUltimateHealthCareCostTrendRate2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ultimate trend</link:label>
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    <link:label id="lab_ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset_23e03972-f7e8-4bed-ab52-2e3710073816_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">&#8212; Changes in demographic assumptions</link:label>
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    <link:label id="lab_ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans_1dc18413-9e64-4509-ba4d-1838493a0f2d_terseLabel_en-US" xlink:label="lab_ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined contribution pension plan expense</link:label>
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    <link:label id="lab_ifrs-full_BorrowingsByNameMember_label_en-US" xlink:label="lab_ifrs-full_BorrowingsByNameMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings by name [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_BorrowingsByNameMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BorrowingsByNameMember" xlink:to="lab_ifrs-full_BorrowingsByNameMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_d8c2ed0d-2150-4ea0-86eb-f82bf6befb67_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from sale of assets</link:label>
    <link:label id="lab_ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from sales of property, plant and equipment, classified as investing activities</link:label>
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    <link:label id="lab_cls_IncomeStatementLocation1Domain_31d38277-6cce-4cf4-9da7-f101fd4a2291_terseLabel_en-US" xlink:label="lab_cls_IncomeStatementLocation1Domain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement Location [Domain]</link:label>
    <link:label id="lab_cls_IncomeStatementLocation1Domain_label_en-US" xlink:label="lab_cls_IncomeStatementLocation1Domain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement Location1 [Domain]</link:label>
    <link:label id="lab_cls_IncomeStatementLocation1Domain_documentation_en-US" xlink:label="lab_cls_IncomeStatementLocation1Domain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Income Statement Location [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_IncomeStatementLocation1Domain" xlink:href="cls-20211231.xsd#cls_IncomeStatementLocation1Domain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_IncomeStatementLocation1Domain" xlink:to="lab_cls_IncomeStatementLocation1Domain" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_SubordinateVotingSharesMember_2334adf6-9bb0-4cf1-9a68-8a0a5455153d_verboseLabel_en-US" xlink:label="lab_cls_SubordinateVotingSharesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">SVS</link:label>
    <link:label id="lab_cls_SubordinateVotingSharesMember_cea4a0d5-ca9e-4e65-8754-6183bb683cf8_terseLabel_en-US" xlink:label="lab_cls_SubordinateVotingSharesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">SVS</link:label>
    <link:label id="lab_cls_SubordinateVotingSharesMember_label_en-US" xlink:label="lab_cls_SubordinateVotingSharesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subordinate Voting Shares [Member]</link:label>
    <link:label id="lab_cls_SubordinateVotingSharesMember_documentation_en-US" xlink:label="lab_cls_SubordinateVotingSharesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subordinate Voting Shares [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_SubordinateVotingSharesMember" xlink:href="cls-20211231.xsd#cls_SubordinateVotingSharesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_SubordinateVotingSharesMember" xlink:to="lab_cls_SubordinateVotingSharesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember_761cd6b8-04ae-4382-8303-d60190987803_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember_label_en-US" xlink:label="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other property, plant and equipment [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherPropertyPlantAndEquipmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:to="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_AcquisitionRelatedCostsForPotentialAcquisitions_7ead4750-8368-448e-8b69-41adfb5930a7_terseLabel_en-US" xlink:label="lab_cls_AcquisitionRelatedCostsForPotentialAcquisitions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition-related costs for potential acquisitions</link:label>
    <link:label id="lab_cls_AcquisitionRelatedCostsForPotentialAcquisitions_label_en-US" xlink:label="lab_cls_AcquisitionRelatedCostsForPotentialAcquisitions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition-related costs for potential acquisitions</link:label>
    <link:label id="lab_cls_AcquisitionRelatedCostsForPotentialAcquisitions_documentation_en-US" xlink:label="lab_cls_AcquisitionRelatedCostsForPotentialAcquisitions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition-related costs for potential acquisitions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_AcquisitionRelatedCostsForPotentialAcquisitions" xlink:href="cls-20211231.xsd#cls_AcquisitionRelatedCostsForPotentialAcquisitions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_AcquisitionRelatedCostsForPotentialAcquisitions" xlink:to="lab_cls_AcquisitionRelatedCostsForPotentialAcquisitions" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_LaterThanSixYearsAndNotLaterThanSevenYearsMember_6dd1b460-7114-4dd1-b9de-0be0b81850ff_terseLabel_en-US" xlink:label="lab_cls_LaterThanSixYearsAndNotLaterThanSevenYearsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Thereafter</link:label>
    <link:label id="lab_cls_LaterThanSixYearsAndNotLaterThanSevenYearsMember_label_en-US" xlink:label="lab_cls_LaterThanSixYearsAndNotLaterThanSevenYearsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later Than Six Years And Not Later Than Seven Years [Member]</link:label>
    <link:label id="lab_cls_LaterThanSixYearsAndNotLaterThanSevenYearsMember_documentation_en-US" xlink:label="lab_cls_LaterThanSixYearsAndNotLaterThanSevenYearsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later Than Six Years And Not Later Than Seven Years [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_LaterThanSixYearsAndNotLaterThanSevenYearsMember" xlink:href="cls-20211231.xsd#cls_LaterThanSixYearsAndNotLaterThanSevenYearsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_LaterThanSixYearsAndNotLaterThanSevenYearsMember" xlink:to="lab_cls_LaterThanSixYearsAndNotLaterThanSevenYearsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityVoluntaryFilers_be28c365-5f6e-4afc-968c-169e07ae7029_terseLabel_en-US" xlink:label="lab_dei_EntityVoluntaryFilers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Voluntary Filers</link:label>
    <link:label id="lab_dei_EntityVoluntaryFilers_label_en-US" xlink:label="lab_dei_EntityVoluntaryFilers" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Voluntary Filers</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityVoluntaryFilers" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityVoluntaryFilers"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityVoluntaryFilers" xlink:to="lab_dei_EntityVoluntaryFilers" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_SalesRevenueNet1Member_c7fe975b-91fe-4646-be8d-659cb36fc388_terseLabel_en-US" xlink:label="lab_cls_SalesRevenueNet1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue</link:label>
    <link:label id="lab_cls_SalesRevenueNet1Member_label_en-US" xlink:label="lab_cls_SalesRevenueNet1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sales Revenue, Net1 [Member]</link:label>
    <link:label id="lab_cls_SalesRevenueNet1Member_documentation_en-US" xlink:label="lab_cls_SalesRevenueNet1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sales Revenue, Net1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_SalesRevenueNet1Member" xlink:href="cls-20211231.xsd#cls_SalesRevenueNet1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_SalesRevenueNet1Member" xlink:to="lab_cls_SalesRevenueNet1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_SharePrice_cb1c9614-f083-44a9-83ed-4801ec0ea184_terseLabel_en-US" xlink:label="lab_cls_SharePrice" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share price (in dollars per share)</link:label>
    <link:label id="lab_cls_SharePrice_label_en-US" xlink:label="lab_cls_SharePrice" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share Price</link:label>
    <link:label id="lab_cls_SharePrice_documentation_en-US" xlink:label="lab_cls_SharePrice" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share Price</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_SharePrice" xlink:href="cls-20211231.xsd#cls_SharePrice"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_SharePrice" xlink:to="lab_cls_SharePrice" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentDerivativeFinancialAssets_c00a7e7f-4471-4bf6-a4ee-560e07fa488b_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentDerivativeFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative assets</link:label>
    <link:label id="lab_ifrs-full_CurrentDerivativeFinancialAssets_label_en-US" xlink:label="lab_ifrs-full_CurrentDerivativeFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current derivative financial assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentDerivativeFinancialAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CurrentDerivativeFinancialAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentDerivativeFinancialAssets" xlink:to="lab_ifrs-full_CurrentDerivativeFinancialAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_aab80fa4-151a-41d1-afda-c4f75b5de69c_terseLabel_en-US" xlink:label="lab_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]</link:label>
    <link:label id="lab_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_label_en-US" xlink:label="lab_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="lab_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory_69768028-6c7b-4ff0-9d32-156cac727572_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Derivatives and Hedging Activities</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about hedging instruments [text block]</link:label>
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    <link:label id="lab_ifrs-full_CurrentProvisions_886f5815-ec7a-43bb-ba81-0d2717aa56a4_verboseLabel_en-US" xlink:label="lab_ifrs-full_CurrentProvisions" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current portion of provisions</link:label>
    <link:label id="lab_ifrs-full_CurrentProvisions_8e28f233-0073-4eaf-a5c4-97f8b6fff33e_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentProvisions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current</link:label>
    <link:label id="lab_ifrs-full_CurrentProvisions_label_en-US" xlink:label="lab_ifrs-full_CurrentProvisions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current provisions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentProvisions" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CurrentProvisions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentProvisions" xlink:to="lab_ifrs-full_CurrentProvisions" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_CashRestructureCharges_f10ce8b6-eedf-4021-9e02-67c596e724b0_terseLabel_en-US" xlink:label="lab_cls_CashRestructureCharges" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash restructure charges</link:label>
    <link:label id="lab_cls_CashRestructureCharges_label_en-US" xlink:label="lab_cls_CashRestructureCharges" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Restructure Charges</link:label>
    <link:label id="lab_cls_CashRestructureCharges_documentation_en-US" xlink:label="lab_cls_CashRestructureCharges" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Restructure Charges</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_CashRestructureCharges" xlink:href="cls-20211231.xsd#cls_CashRestructureCharges"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_CashRestructureCharges" xlink:to="lab_cls_CashRestructureCharges" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_DeferredTaxRelatingToBusinessCombinationsDeferredTaxLiabilities_47a67cc7-403c-4daa-96dd-48b8a1c76ad2_terseLabel_en-US" xlink:label="lab_cls_DeferredTaxRelatingToBusinessCombinationsDeferredTaxLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions from business combinations</link:label>
    <link:label id="lab_cls_DeferredTaxRelatingToBusinessCombinationsDeferredTaxLiabilities_label_en-US" xlink:label="lab_cls_DeferredTaxRelatingToBusinessCombinationsDeferredTaxLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Relating To Business Combinations, Deferred Tax Liabilities</link:label>
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    <link:label id="lab_cls_CurrentBorrowingsAndLeaseLiabilities_f9dd9aab-1746-4ad5-bc0e-a3926cc7fd54_terseLabel_en-US" xlink:label="lab_cls_CurrentBorrowingsAndLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current portion of borrowings under credit facility &amp; lease obligations</link:label>
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    <link:label id="lab_cls_CurrentBorrowingsAndLeaseLiabilities_label_en-US" xlink:label="lab_cls_CurrentBorrowingsAndLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Borrowings And Lease Liabilities</link:label>
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    <link:label id="lab_ifrs-full_TradeAndOtherPayablesToTradeSuppliers_019c0076-105b-4435-9b4e-8fb68b0fea86_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherPayablesToTradeSuppliers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts payable</link:label>
    <link:label id="lab_ifrs-full_TradeAndOtherPayablesToTradeSuppliers_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherPayablesToTradeSuppliers" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade payables</link:label>
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    <link:label id="lab_cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1_documentation_en-US" xlink:label="lab_cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1" xlink:href="cls-20211231.xsd#cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1"/>
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    <link:label id="lab_dei_EntityInteractiveDataCurrent_0b78848f-c871-4c08-9f51-ebd730d32c3a_terseLabel_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Interactive Data Current</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityInteractiveDataCurrent" xlink:to="lab_dei_EntityInteractiveDataCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_RestrictedStockUnitsRSU1Member_c957f850-26bb-4454-a21e-efb02cb6a8bc_terseLabel_en-US" xlink:label="lab_cls_RestrictedStockUnitsRSU1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">RSUs</link:label>
    <link:label id="lab_cls_RestrictedStockUnitsRSU1Member_label_en-US" xlink:label="lab_cls_RestrictedStockUnitsRSU1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted Stock Units (RSU)1 [Member]</link:label>
    <link:label id="lab_cls_RestrictedStockUnitsRSU1Member_documentation_en-US" xlink:label="lab_cls_RestrictedStockUnitsRSU1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted Stock Units (RSU)1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_RestrictedStockUnitsRSU1Member" xlink:href="cls-20211231.xsd#cls_RestrictedStockUnitsRSU1Member"/>
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    <link:label id="lab_cls_DefinedBenefitPlanAmountsForAssetLiabilityRecognizedInStatementOfFinancialPosition_0192756c-e455-46d4-9dee-3551d01c3767_totalLabel_en-US" xlink:label="lab_cls_DefinedBenefitPlanAmountsForAssetLiabilityRecognizedInStatementOfFinancialPosition" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Excess (deficiency) of plan assets over accrued benefit obligations</link:label>
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    <link:label id="lab_cls_DefinedBenefitPlanAmountsForAssetLiabilityRecognizedInStatementOfFinancialPosition_documentation_en-US" xlink:label="lab_cls_DefinedBenefitPlanAmountsForAssetLiabilityRecognizedInStatementOfFinancialPosition" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Amounts For Asset (Liability) Recognized In Statement Of Financial Position</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_DefinedBenefitPlanAmountsForAssetLiabilityRecognizedInStatementOfFinancialPosition" xlink:href="cls-20211231.xsd#cls_DefinedBenefitPlanAmountsForAssetLiabilityRecognizedInStatementOfFinancialPosition"/>
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    <link:label id="lab_cls_PlanAssetsDecreaseDueToRestrictions_f18e33a6-7ec5-4c03-8aaf-98857c06395c_negatedLabel_en-US" xlink:label="lab_cls_PlanAssetsDecreaseDueToRestrictions" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan assets, decrease due to restrictions</link:label>
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    <link:label id="lab_cls_PlanAssetsDecreaseDueToRestrictions_documentation_en-US" xlink:label="lab_cls_PlanAssetsDecreaseDueToRestrictions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Assets, Decrease Due To Restrictions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_PlanAssetsDecreaseDueToRestrictions" xlink:href="cls-20211231.xsd#cls_PlanAssetsDecreaseDueToRestrictions"/>
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    <link:label id="lab_ifrs-full_SellingGeneralAndAdministrativeExpense_7db68d57-0d8f-4a5c-a8e7-a0c025cac2d4_terseLabel_en-US" xlink:label="lab_ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Selling, general and administrative expenses (SG&amp;A)</link:label>
    <link:label id="lab_ifrs-full_SellingGeneralAndAdministrativeExpense_label_en-US" xlink:label="lab_ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Selling, general and administrative expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_SellingGeneralAndAdministrativeExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:to="lab_ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IssueOfEquity_6b1cf2b1-45ba-4d8d-9fbe-a05978219755_terseLabel_en-US" xlink:label="lab_ifrs-full_IssueOfEquity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of capital stock</link:label>
    <link:label id="lab_ifrs-full_IssueOfEquity_label_en-US" xlink:label="lab_ifrs-full_IssueOfEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issue of equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssueOfEquity" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IssueOfEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IssueOfEquity" xlink:to="lab_ifrs-full_IssueOfEquity" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentMember_a8d71bc8-b213-4528-aa2b-70386fcff729_terseLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentMember_label_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_PropertyPlantAndEquipmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="lab_ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_ConcentrationRiskByType1Domain_ef88cfff-9c61-4685-b1e0-f29746260521_terseLabel_en-US" xlink:label="lab_cls_ConcentrationRiskByType1Domain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk By Type1 [Domain]</link:label>
    <link:label id="lab_cls_ConcentrationRiskByType1Domain_label_en-US" xlink:label="lab_cls_ConcentrationRiskByType1Domain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk By Type1 [Domain]</link:label>
    <link:label id="lab_cls_ConcentrationRiskByType1Domain_documentation_en-US" xlink:label="lab_cls_ConcentrationRiskByType1Domain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Concentration Risk By Type1 [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_ConcentrationRiskByType1Domain" xlink:href="cls-20211231.xsd#cls_ConcentrationRiskByType1Domain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_ConcentrationRiskByType1Domain" xlink:to="lab_cls_ConcentrationRiskByType1Domain" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_IncomeTaxRelatingToReclassificationOfNetGainLossOnCashFlowHedgesOfOtherComprehensiveIncome_615c1e3a-983c-46e2-b0dc-5cf6947021f9_terseLabel_en-US" xlink:label="lab_cls_IncomeTaxRelatingToReclassificationOfNetGainLossOnCashFlowHedgesOfOtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Release of income tax (expense) benefit relating to reclassification of net loss on cash flow hedges to operations</link:label>
    <link:label id="lab_cls_IncomeTaxRelatingToReclassificationOfNetGainLossOnCashFlowHedgesOfOtherComprehensiveIncome_label_en-US" xlink:label="lab_cls_IncomeTaxRelatingToReclassificationOfNetGainLossOnCashFlowHedgesOfOtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Relating To Reclassification Of Net Gain (Loss) On Cash Flow Hedges Of Other Comprehensive Income</link:label>
    <link:label id="lab_cls_IncomeTaxRelatingToReclassificationOfNetGainLossOnCashFlowHedgesOfOtherComprehensiveIncome_documentation_en-US" xlink:label="lab_cls_IncomeTaxRelatingToReclassificationOfNetGainLossOnCashFlowHedgesOfOtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Relating To Reclassification Of Net Gain (Loss) On Cash Flow Hedges Of Other Comprehensive Income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_IncomeTaxRelatingToReclassificationOfNetGainLossOnCashFlowHedgesOfOtherComprehensiveIncome" xlink:href="cls-20211231.xsd#cls_IncomeTaxRelatingToReclassificationOfNetGainLossOnCashFlowHedgesOfOtherComprehensiveIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_IncomeTaxRelatingToReclassificationOfNetGainLossOnCashFlowHedgesOfOtherComprehensiveIncome" xlink:to="lab_cls_IncomeTaxRelatingToReclassificationOfNetGainLossOnCashFlowHedgesOfOtherComprehensiveIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_ImpaktAcquisitionMember_be5ebc9c-16dc-4bbc-a31b-1a2a9fe20474_terseLabel_en-US" xlink:label="lab_cls_ImpaktAcquisitionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impakt Acquisition</link:label>
    <link:label id="lab_cls_ImpaktAcquisitionMember_label_en-US" xlink:label="lab_cls_ImpaktAcquisitionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impakt Acquisition [Member]</link:label>
    <link:label id="lab_cls_ImpaktAcquisitionMember_documentation_en-US" xlink:label="lab_cls_ImpaktAcquisitionMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impakt Acquisition</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_ImpaktAcquisitionMember" xlink:href="cls-20211231.xsd#cls_ImpaktAcquisitionMember"/>
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    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_919f7bd3-0178-41b3-b94e-0086b84b770e_terseLabel_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_label_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCommonStockSharesOutstanding" xlink:to="lab_dei_EntityCommonStockSharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SegmentsAxis_8b53bad3-e326-4956-891b-5ee1f84beff4_terseLabel_en-US" xlink:label="lab_ifrs-full_SegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments [axis]</link:label>
    <link:label id="lab_ifrs-full_SegmentsAxis_label_en-US" xlink:label="lab_ifrs-full_SegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments [axis]</link:label>
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    <link:label id="lab_cls_IncomeStatementLocation1Axis_documentation_en-US" xlink:label="lab_cls_IncomeStatementLocation1Axis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement Location [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_IncomeStatementLocation1Axis" xlink:href="cls-20211231.xsd#cls_IncomeStatementLocation1Axis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_IncomeStatementLocation1Axis" xlink:to="lab_cls_IncomeStatementLocation1Axis" xlink:type="arc" order="1"/>
    <link:label id="lab_currency_GBP_7b2f9ceb-53d1-4ec2-ada0-84595ecd3a7f_verboseLabel_en-US" xlink:label="lab_currency_GBP" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">British pound</link:label>
    <link:label id="lab_currency_GBP_label_en-US" xlink:label="lab_currency_GBP" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">United Kingdom, Pounds</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_currency_GBP" xlink:href="https://xbrl.sec.gov/currency/2021/currency-2021.xsd#currency_GBP"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_currency_GBP" xlink:to="lab_currency_GBP" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_ReclassificationBetweenDeferredTaxAssetAndDeferredTaxLiabilityRelatedTemporaryDifferencesMember_58a6b581-a111-4fc8-bd40-327e862bc35d_terseLabel_en-US" xlink:label="lab_cls_ReclassificationBetweenDeferredTaxAssetAndDeferredTaxLiabilityRelatedTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reclassification between deferred tax assets and deferred tax liabilities</link:label>
    <link:label id="lab_cls_ReclassificationBetweenDeferredTaxAssetAndDeferredTaxLiabilityRelatedTemporaryDifferencesMember_label_en-US" xlink:label="lab_cls_ReclassificationBetweenDeferredTaxAssetAndDeferredTaxLiabilityRelatedTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reclassification Between Deferred Tax Asset And Deferred Tax Liability Related Temporary Differences [Member]</link:label>
    <link:label id="lab_cls_ReclassificationBetweenDeferredTaxAssetAndDeferredTaxLiabilityRelatedTemporaryDifferencesMember_documentation_en-US" xlink:label="lab_cls_ReclassificationBetweenDeferredTaxAssetAndDeferredTaxLiabilityRelatedTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reclassification Between Deferred Tax Asset And Deferred Tax Liability Related Temporary Differences</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_ReclassificationBetweenDeferredTaxAssetAndDeferredTaxLiabilityRelatedTemporaryDifferencesMember" xlink:href="cls-20211231.xsd#cls_ReclassificationBetweenDeferredTaxAssetAndDeferredTaxLiabilityRelatedTemporaryDifferencesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_ReclassificationBetweenDeferredTaxAssetAndDeferredTaxLiabilityRelatedTemporaryDifferencesMember" xlink:to="lab_cls_ReclassificationBetweenDeferredTaxAssetAndDeferredTaxLiabilityRelatedTemporaryDifferencesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentAssets_f1d1a978-e5d1-49d5-a30b-f4c103ace66e_totalLabel_en-US" xlink:label="lab_ifrs-full_CurrentAssets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total current assets</link:label>
    <link:label id="lab_ifrs-full_CurrentAssets_label_en-US" xlink:label="lab_ifrs-full_CurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CurrentAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentAssets" xlink:to="lab_ifrs-full_CurrentAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement_159f1c96-d1b6-4f3e-9838-d25cfae93cef_negatedTerseLabel_en-US" xlink:label="lab_cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss on pension annuity purchases (see note 18(a))</link:label>
    <link:label id="lab_cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement_label_en-US" xlink:label="lab_cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Comprehensive Income, Net of Tax, Gain (Loss) on Settlement</link:label>
    <link:label id="lab_cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement_documentation_en-US" xlink:label="lab_cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Comprehensive Income, Net of Tax, Gain (Loss) on Settlement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement" xlink:href="cls-20211231.xsd#cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement" xlink:to="lab_cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_PensionsAndNonpensionPostretirementBenefitRelatedTemporaryDifferencesMember_d206f96d-1347-468a-85b9-cf13c43a4fd4_terseLabel_en-US" xlink:label="lab_cls_PensionsAndNonpensionPostretirementBenefitRelatedTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pensions and non-pension post-retirement benefits</link:label>
    <link:label id="lab_cls_PensionsAndNonpensionPostretirementBenefitRelatedTemporaryDifferencesMember_label_en-US" xlink:label="lab_cls_PensionsAndNonpensionPostretirementBenefitRelatedTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pensions And Non-pension Post-retirement Benefit Related Temporary Differences [Member]</link:label>
    <link:label id="lab_cls_PensionsAndNonpensionPostretirementBenefitRelatedTemporaryDifferencesMember_documentation_en-US" xlink:label="lab_cls_PensionsAndNonpensionPostretirementBenefitRelatedTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pensions And Non-pension Post-retirement Benefit Related Temporary Differences</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_PensionsAndNonpensionPostretirementBenefitRelatedTemporaryDifferencesMember" xlink:href="cls-20211231.xsd#cls_PensionsAndNonpensionPostretirementBenefitRelatedTemporaryDifferencesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_PensionsAndNonpensionPostretirementBenefitRelatedTemporaryDifferencesMember" xlink:to="lab_cls_PensionsAndNonpensionPostretirementBenefitRelatedTemporaryDifferencesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset_1bfc7706-7af8-41ef-89c1-202051fc3743_verboseLabel_en-US" xlink:label="lab_ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Benefit payments from plan</link:label>
    <link:label id="lab_ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset_47dcd333-3299-464f-8c60-3f5b17cc32e2_negatedLabel_en-US" xlink:label="lab_ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Benefit payments from plan</link:label>
    <link:label id="lab_ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset_label_en-US" xlink:label="lab_ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Decrease (increase) in net defined benefit liability (asset) resulting from payments from plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:to="lab_ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:type="arc" order="1"/>
    <link:label id="lab_currency_KRW_cc688687-f0b5-4d83-b52c-260f27a52056_terseLabel_en-US" xlink:label="lab_currency_KRW" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Korean won</link:label>
    <link:label id="lab_currency_KRW_label_en-US" xlink:label="lab_currency_KRW" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Korea (South), Won</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_currency_KRW" xlink:href="https://xbrl.sec.gov/currency/2021/currency-2021.xsd#currency_KRW"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_currency_KRW" xlink:to="lab_currency_KRW" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_NumberOfSharesOutstandingRollForward_234c6197-f545-426a-a1f6-adfc6c1b8db7_terseLabel_en-US" xlink:label="lab_cls_NumberOfSharesOutstandingRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Shares Outstanding [Roll Forward]</link:label>
    <link:label id="lab_cls_NumberOfSharesOutstandingRollForward_label_en-US" xlink:label="lab_cls_NumberOfSharesOutstandingRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Shares Outstanding [Roll Forward]</link:label>
    <link:label id="lab_cls_NumberOfSharesOutstandingRollForward_documentation_en-US" xlink:label="lab_cls_NumberOfSharesOutstandingRollForward" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Shares Outstanding [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_NumberOfSharesOutstandingRollForward" xlink:href="cls-20211231.xsd#cls_NumberOfSharesOutstandingRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_NumberOfSharesOutstandingRollForward" xlink:to="lab_cls_NumberOfSharesOutstandingRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfOperatingSegmentsExplanatory_714e2cb8-8463-4cd3-83d1-a8ab595ad2b3_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOperatingSegmentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Information by Reportable Segment</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfOperatingSegmentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfOperatingSegmentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of operating segments [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfOperatingSegmentsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfOperatingSegmentsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfOtherProvisionsLineItems_2caab073-90db-4697-9a50-2cd90c2e350f_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of other provisions [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfOtherProvisionsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of other provisions [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfOtherProvisionsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="lab_ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfIntangibleAssetsLineItems_1ec6c987-feee-47b8-a50c-ff0d43bb2d29_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about intangible assets [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfIntangibleAssetsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about intangible assets [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="lab_ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_CapitalSharesReservedforFutureIssuance_3ec4b74e-dd4c-4623-9332-e1b3c10fe3a7_terseLabel_en-US" xlink:label="lab_cls_CapitalSharesReservedforFutureIssuance" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares remaining in reserve for issuance (in shares)</link:label>
    <link:label id="lab_cls_CapitalSharesReservedforFutureIssuance_label_en-US" xlink:label="lab_cls_CapitalSharesReservedforFutureIssuance" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital Shares Reserved for Future Issuance</link:label>
    <link:label id="lab_cls_CapitalSharesReservedforFutureIssuance_documentation_en-US" xlink:label="lab_cls_CapitalSharesReservedforFutureIssuance" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital Shares Reserved for Future Issuance</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_CapitalSharesReservedforFutureIssuance" xlink:href="cls-20211231.xsd#cls_CapitalSharesReservedforFutureIssuance"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_CapitalSharesReservedforFutureIssuance" xlink:to="lab_cls_CapitalSharesReservedforFutureIssuance" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityDomain_1359777e-7b41-4cbd-b290-88243f4004ca_terseLabel_en-US" xlink:label="lab_dei_EntityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity [Domain]</link:label>
    <link:label id="lab_dei_EntityDomain_label_en-US" xlink:label="lab_dei_EntityDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityDomain" xlink:to="lab_dei_EntityDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_country_LA_95327fb3-5ae0-4ed0-8f03-813bc5185644_terseLabel_en-US" xlink:label="lab_country_LA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Laos</link:label>
    <link:label id="lab_country_LA_label_en-US" xlink:label="lab_country_LA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">LAOS</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_country_LA" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_LA"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_LA" xlink:to="lab_country_LA" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdditionsToRightofuseAssets_80762cc0-b0a7-49a3-8aa9-c7469ac6a06f_terseLabel_en-US" xlink:label="lab_ifrs-full_AdditionsToRightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions</link:label>
    <link:label id="lab_ifrs-full_AdditionsToRightofuseAssets_label_en-US" xlink:label="lab_ifrs-full_AdditionsToRightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions to right-of-use assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionsToRightofuseAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdditionsToRightofuseAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdditionsToRightofuseAssets" xlink:to="lab_ifrs-full_AdditionsToRightofuseAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_LineofCreditFacilityCommitmentFeePercentage1_2544e4f5-649a-475f-b233-ccafebe28a6d_terseLabel_en-US" xlink:label="lab_cls_LineofCreditFacilityCommitmentFeePercentage1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitment fees (percent)</link:label>
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    <link:label id="lab_ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans_a35670ce-6c0a-4221-a49e-5cb8acac5849_totalLabel_en-US" xlink:label="lab_ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Post-employment benefit expense, defined benefit plans</link:label>
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    <link:label id="lab_cls_NumberOfVotesPerShare_d3611713-613e-4c7b-856b-518a73a793d4_terseLabel_en-US" xlink:label="lab_cls_NumberOfVotesPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subordinate voting shares, number of votes per share</link:label>
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    <link:label id="lab_ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense_5291c8d2-30d6-434e-afe4-d3b791fe3417_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation and amortization</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections_c96d51be-3353-413e-864e-196b1fbf5ce0_verboseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discount rate (percentage)</link:label>
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    <link:label id="lab_ifrs-full_ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset_5829a6eb-65a0-4cb8-a38f-095131034ca2_terseLabel_en-US" xlink:label="lab_ifrs-full_ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Actuarial losses in other comprehensive income</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems_7ed43258-b003-4047-95fb-7ef0de42e3cb_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of range of exercise prices of outstanding share options [line items]</link:label>
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    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate_3874872b-3fad-4958-96c7-82783291fcc0_terseLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment</link:label>
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    <link:label id="lab_ifrs-full_DilutedEarningsLossPerShare_b0e3c07a-7681-4609-af9c-a099887067ca_terseLabel_en-US" xlink:label="lab_ifrs-full_DilutedEarningsLossPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Diluted earnings per share (in dollars per share)</link:label>
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    <link:label id="lab_ifrs-full_ReconciliationOfChangesInIntangibleAssetsAndGoodwillAbstract_a8c97688-4be7-4eb1-9353-47e61f4e59b5_terseLabel_en-US" xlink:label="lab_ifrs-full_ReconciliationOfChangesInIntangibleAssetsAndGoodwillAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of changes in intangible assets and goodwill [abstract]</link:label>
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    <link:label id="lab_currency_CAD_3693de53-92df-46a4-9b96-4a0603ce3650_terseLabel_en-US" xlink:label="lab_currency_CAD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canadian dollar</link:label>
    <link:label id="lab_currency_CAD_label_en-US" xlink:label="lab_currency_CAD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canada, Dollars</link:label>
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    <link:label id="lab_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_9b581062-d061-475e-bfd0-59b1bdead059_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares granted (in shares)</link:label>
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    <link:label id="lab_cls_CashAndCashEquivalentsPeriodIncreaseDecreaseRollForward_label_en-US" xlink:label="lab_cls_CashAndCashEquivalentsPeriodIncreaseDecreaseRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash And Cash Equivalents, Period Increase (Decrease) [Roll Forward]</link:label>
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    <link:label id="lab_dei_DocumentFiscalYearFocus_20a14fe0-955d-48ad-9630-8c07fe411f47_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Fiscal Year Focus</link:label>
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    <link:label id="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_94bd09dc-b8c4-4e7c-a558-4119e10afea9_verboseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee SBC expense</link:label>
    <link:label id="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_09268f66-3c78-4f42-a0ec-0cd5b04ed517_terseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">SBC expense included in above employee-related costs</link:label>
    <link:label id="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_label_en-US" xlink:label="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense from share-based payment transactions with employees</link:label>
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    <link:label id="lab_cls_SharebasedCompensationArrangementBySharebasedPaymentAwardPercentageOfAnnualFeesPaidToBoardOfDirectorsPaidInFormOfAwards_3a6882c1-7dfc-472a-9759-f11ba6612587_terseLabel_en-US" xlink:label="lab_cls_SharebasedCompensationArrangementBySharebasedPaymentAwardPercentageOfAnnualFeesPaidToBoardOfDirectorsPaidInFormOfAwards" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of annual fees paid to Board of Directors paid in form of awards (percent)</link:label>
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    <link:label id="lab_cls_SharebasedCompensationArrangementBySharebasedPaymentAwardPercentageOfAnnualFeesPaidToBoardOfDirectorsPaidInFormOfAwards_documentation_en-US" xlink:label="lab_cls_SharebasedCompensationArrangementBySharebasedPaymentAwardPercentageOfAnnualFeesPaidToBoardOfDirectorsPaidInFormOfAwards" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement By Share-based Payment Award, Percentage Of Annual Fees Paid To Board Of Directors Paid In Form Of Awards</link:label>
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    <link:label id="lab_ifrs-full_RightofuseAssetsMember_5dd01e33-01d7-4673-8ed4-0a14d6f46128_terseLabel_en-US" xlink:label="lab_ifrs-full_RightofuseAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right-of-use assets</link:label>
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    <link:label id="lab_country_KR_debf5c54-6233-4fcc-8ac4-5fa3da3dd1d3_verboseLabel_en-US" xlink:label="lab_country_KR" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">South Korea</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfGovernmentGrantsExplanatory_a6d48208-fcf6-4b64-ac42-7a9d6c46011d_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfGovernmentGrantsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">COVID-19 Government Subsidies</link:label>
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    <link:label id="lab_cls_ReconciliationOfChangesInDeferredTaxAssetRollForward_d5892b67-aaee-4d21-bf21-f6e6c5cf6709_terseLabel_en-US" xlink:label="lab_cls_ReconciliationOfChangesInDeferredTaxAssetRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of changes in deferred tax liability (asset) [abstract]</link:label>
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    <link:label id="lab_ifrs-full_EntitysTotalForBusinessCombinationsMember_deee89ca-1e14-46cf-a74c-c666bb7dc694_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for business combinations</link:label>
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    <link:label id="lab_cls_CiscoSystemsMember_6928bd1e-caf9-4494-9910-ded0504df82d_terseLabel_en-US" xlink:label="lab_cls_CiscoSystemsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cisco Systems</link:label>
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    <link:label id="lab_cls_AdvancedTechnologySolutionsMember_bf184de9-e9bb-48ba-8d3d-d0ae4b037778_verboseLabel_en-US" xlink:label="lab_cls_AdvancedTechnologySolutionsMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ATS</link:label>
    <link:label id="lab_cls_AdvancedTechnologySolutionsMember_label_en-US" xlink:label="lab_cls_AdvancedTechnologySolutionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Advanced Technology Solutions [Member]</link:label>
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    <link:label id="lab_cls_NumberOfRealEstatePartnershipsRelatedPartyTransactions_ef472c50-607f-4b90-8af7-d77fca6e97b9_verboseLabel_en-US" xlink:label="lab_cls_NumberOfRealEstatePartnershipsRelatedPartyTransactions" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of real estate partnerships to purchase property</link:label>
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    <link:label id="lab_dei_EntityRegistrantName_9ef21066-2a19-44d8-903d-5e50952f871f_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Registrant Name</link:label>
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    <link:label id="lab_ifrs-full_PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset_c95bc30c-8bd8-4ba9-aac9-359adfd65b60_terseLabel_en-US" xlink:label="lab_ifrs-full_PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Settlement payments from plan</link:label>
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    <link:label id="lab_cls_PlanName1Domain_documentation_en-US" xlink:label="lab_cls_PlanName1Domain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Plan Name [Axis]</link:label>
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    <link:label id="lab_ifrs-full_JointControlOrSignificantInfluenceMember_62410044-8ec3-4639-b900-351740e4edf4_terseLabel_en-US" xlink:label="lab_ifrs-full_JointControlOrSignificantInfluenceMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entities with significant influence</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_JointControlOrSignificantInfluenceMember" xlink:to="lab_ifrs-full_JointControlOrSignificantInfluenceMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_RevolvingFacilityDueJune2023Member_6dbf2a12-330e-4cd6-acf8-fb3bb2aa7fb7_terseLabel_en-US" xlink:label="lab_cls_RevolvingFacilityDueJune2023Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolver</link:label>
    <link:label id="lab_cls_RevolvingFacilityDueJune2023Member_4719db67-4b38-4222-8965-9da5078a11e6_verboseLabel_en-US" xlink:label="lab_cls_RevolvingFacilityDueJune2023Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolving Facility Due June 2023</link:label>
    <link:label id="lab_cls_RevolvingFacilityDueJune2023Member_label_en-US" xlink:label="lab_cls_RevolvingFacilityDueJune2023Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolving Facility Due June 2023 [Member]</link:label>
    <link:label id="lab_cls_RevolvingFacilityDueJune2023Member_documentation_en-US" xlink:label="lab_cls_RevolvingFacilityDueJune2023Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolving Facility Due June 2023 [Member]</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents_d746e9bf-4903-4086-8c49-b0b9c26e2389_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for determining components of cash and cash equivalents [text block]</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory_06033a9b-c219-4fa5-ab90-54512b0ce6c1_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Functional and presentation currency</link:label>
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    <link:label id="lab_cls_NumberOfSharesHolderIsEntitledToPerVestedUnit_08df1f2c-1e24-4598-85e5-28f9321bb990_terseLabel_en-US" xlink:label="lab_cls_NumberOfSharesHolderIsEntitledToPerVestedUnit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares of SVS holder of vested PSU or RSU unit is entitled to (in shares)</link:label>
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    <link:label id="lab_cls_TermLoansMember_b7706e3a-6f25-425d-965e-cb9e61c46da4_terseLabel_en-US" xlink:label="lab_cls_TermLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term Loans</link:label>
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    <link:label id="lab_cls_TermLoansMember_documentation_en-US" xlink:label="lab_cls_TermLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term Loans [Member]</link:label>
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    <link:label id="lab_ifrs-full_CurrencyRiskMember_67e13565-601f-4926-a430-1e04fe51c9a3_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrencyRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign currency forwards and swaps</link:label>
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    <link:label id="lab_cls_DeferredTaxRelatingToItemsCreditedChargedDirectlyToEquityDeferredTaxLiabilities_dbca98de-d064-4dcf-8567-14bfa993c793_terseLabel_en-US" xlink:label="lab_cls_DeferredTaxRelatingToItemsCreditedChargedDirectlyToEquityDeferredTaxLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Charged (credited) directly to equity</link:label>
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    <link:label id="lab_ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement_aa61f4c8-242a-4eaf-9d74-efc0994e0600_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercised (in shares)</link:label>
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    <link:label id="lab_ifrs-full_NetDefinedBenefitLiabilityAssetMember_b4bb05fd-f940-437d-b55c-942537d8040a_terseLabel_en-US" xlink:label="lab_ifrs-full_NetDefinedBenefitLiabilityAssetMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net defined benefit liability (asset)</link:label>
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    <link:label id="lab_ifrs-full_AccountingProfit_f6d5134a-5ff8-4a55-815c-3d7517d93a77_terseLabel_en-US" xlink:label="lab_ifrs-full_AccountingProfit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings before income taxes</link:label>
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    <link:label id="lab_cls_OtherNonCurrentAssetsRecognisedAsOfAcquisitionDate_d22c13fe-ee2e-49c4-97e6-958a7ff4c693_terseLabel_en-US" xlink:label="lab_cls_OtherNonCurrentAssetsRecognisedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other non-current assets</link:label>
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    <link:label id="lab_cls_OtherNonCurrentAssetsRecognisedAsOfAcquisitionDate_documentation_en-US" xlink:label="lab_cls_OtherNonCurrentAssetsRecognisedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Non-current Assets Recognised As Of Acquisition Date</link:label>
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    <link:label id="lab_cls_LeasesExtensionPeriods_f7e2d264-7f5a-43f1-b205-82134a37615d_terseLabel_en-US" xlink:label="lab_cls_LeasesExtensionPeriods" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Extension term</link:label>
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    <link:label id="lab_cls_LeasesExtensionPeriods_documentation_en-US" xlink:label="lab_cls_LeasesExtensionPeriods" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases, Extension Periods</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfDefinedBenefitPlansTable_6c624520-a83d-40ca-bf26-5973f210c8d0_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of defined benefit plans [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDefinedBenefitPlansTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of defined benefit plans [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:to="lab_ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory_d4104aee-6b68-45ea-a3cf-58601dbf78f4_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes In Deferred Tax Assets And Liabilities</link:label>
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    <link:label id="lab_ifrs-full_Equity_8f9ec2b6-93d0-4659-a440-6f002051168a_periodStartLabel_en-US" xlink:label="lab_ifrs-full_Equity" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity, beginning balance</link:label>
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    <link:label id="lab_ifrs-full_Equity_label_en-US" xlink:label="lab_ifrs-full_Equity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity</link:label>
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    <link:label id="lab_dei_Security12bTitle_0067dece-f799-4121-a8e3-d20464ab23ec_terseLabel_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:label id="lab_dei_Security12bTitle_label_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_Security12bTitle"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_Security12bTitle" xlink:to="lab_dei_Security12bTitle" xlink:type="arc" order="1"/>
    <link:label id="lab_country_SG_dcbb1ff8-244b-420f-84ba-ff6c88bf90ec_terseLabel_en-US" xlink:label="lab_country_SG" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Singapore</link:label>
    <link:label id="lab_country_SG_label_en-US" xlink:label="lab_country_SG" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">SINGAPORE</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_country_SG" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_SG"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_SG" xlink:to="lab_country_SG" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets_e3fd3cba-c670-4613-8437-f1b16ba3ba0c_terseLabel_en-US" xlink:label="lab_cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effects of foreign exchange</link:label>
    <link:label id="lab_cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets_label_en-US" xlink:label="lab_cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) Through Net Exchange Differences, Deferred Tax Assets</link:label>
    <link:label id="lab_cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets_documentation_en-US" xlink:label="lab_cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) Through Net Exchange Differences, Deferred Tax Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets" xlink:href="cls-20211231.xsd#cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets" xlink:to="lab_cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_TitleOfIndividualAxis_2af7dba5-6c63-4704-9f55-03225b12cb41_terseLabel_en-US" xlink:label="lab_srt_TitleOfIndividualAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of Individual [Axis]</link:label>
    <link:label id="lab_srt_TitleOfIndividualAxis_label_en-US" xlink:label="lab_srt_TitleOfIndividualAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of Individual [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_TitleOfIndividualAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_TitleOfIndividualAxis" xlink:to="lab_srt_TitleOfIndividualAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentType_e2b2e979-3243-4fcc-a182-4f28d9b2cc03_terseLabel_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Type</link:label>
    <link:label id="lab_dei_DocumentType_label_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Type</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentType"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType" xlink:to="lab_dei_DocumentType" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory_1c427210-6a40-4826-bc33-f4538ab60ffc_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary of Financial Position of Pension and Other Benefit Plans</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of net defined benefit liability (asset) [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory"/>
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    <link:label id="lab_cls_RepaymentsOfBorrowingsPercentageOfSpecifiedExcessCashFlow_3d7e459d-facf-4704-9dc6-d8cd054cafe7_terseLabel_en-US" xlink:label="lab_cls_RepaymentsOfBorrowingsPercentageOfSpecifiedExcessCashFlow" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Repayments of borrowings, percentage of excess cash flow (percent)</link:label>
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    <link:label id="lab_cls_RepaymentsOfBorrowingsPercentageOfSpecifiedExcessCashFlow_documentation_en-US" xlink:label="lab_cls_RepaymentsOfBorrowingsPercentageOfSpecifiedExcessCashFlow" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Repayments Of Borrowings, Percentage Of Specified Excess Cash Flow</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_RepaymentsOfBorrowingsPercentageOfSpecifiedExcessCashFlow" xlink:href="cls-20211231.xsd#cls_RepaymentsOfBorrowingsPercentageOfSpecifiedExcessCashFlow"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_RepaymentsOfBorrowingsPercentageOfSpecifiedExcessCashFlow" xlink:to="lab_cls_RepaymentsOfBorrowingsPercentageOfSpecifiedExcessCashFlow" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AggregatedMeasurementMember_f71e2605-8ca4-4992-b5b1-73a5b2e8ddb8_terseLabel_en-US" xlink:label="lab_ifrs-full_AggregatedMeasurementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Aggregated measurement</link:label>
    <link:label id="lab_ifrs-full_AggregatedMeasurementMember_label_en-US" xlink:label="lab_ifrs-full_AggregatedMeasurementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Aggregated measurement [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AggregatedMeasurementMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AggregatedMeasurementMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AggregatedMeasurementMember" xlink:to="lab_ifrs-full_AggregatedMeasurementMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_BusinessContactMember_32afe1f1-4ee5-4037-bccc-210af46ee574_terseLabel_en-US" xlink:label="lab_dei_BusinessContactMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Contact</link:label>
    <link:label id="lab_dei_BusinessContactMember_label_en-US" xlink:label="lab_dei_BusinessContactMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Contact [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_BusinessContactMember" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_BusinessContactMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_BusinessContactMember" xlink:to="lab_dei_BusinessContactMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities_7915c7eb-2f47-4ddc-b7db-bd5d721bda34_terseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable lease payments not included in the measurement of lease obligations</link:label>
    <link:label id="lab_ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities_label_en-US" xlink:label="lab_ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense relating to variable lease payments not included in measurement of lease liabilities</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants_1c0c2083-ea62-4a6d-92d8-0cc3c0073a27_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Government Subsidies</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for government grants [text block]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants" xlink:to="lab_ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants" xlink:type="arc" order="1"/>
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    <link:label id="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_2a45ef32-7f63-45bd-aec1-9d3898fb421c_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of terms and conditions of share-based payment arrangement [line items]</link:label>
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    <link:label id="lab_currency_SGD_67824c17-8655-4851-9552-21056c5268d1_terseLabel_en-US" xlink:label="lab_currency_SGD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Singapore dollar</link:label>
    <link:label id="lab_currency_SGD_label_en-US" xlink:label="lab_currency_SGD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Singapore, Dollars</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory_5686b315-6369-4df4-ad15-cc90b481ef78_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of compliance</link:label>
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    <link:label id="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent_f6a62520-8cac-4b15-a42c-7323f776ec5f_totalLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net earnings</link:label>
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    <link:label id="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent_label_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (loss), attributable to owners of parent</link:label>
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    <link:label id="lab_ifrs-full_ProceedsFromIssuingShares_1129604c-56c5-4215-be5a-542ac05eb11f_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromIssuingShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of capital stock</link:label>
    <link:label id="lab_ifrs-full_ProceedsFromIssuingShares_label_en-US" xlink:label="lab_ifrs-full_ProceedsFromIssuingShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from issuing shares</link:label>
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    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract_9ebd94ee-5a63-4b11-b50b-8c78e666a59c_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating activities:</link:label>
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    <link:label id="lab_cls_AuditInformationAbstract_label_en-US" xlink:label="lab_cls_AuditInformationAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Audit Information [Abstract]</link:label>
    <link:label id="lab_cls_AuditInformationAbstract_documentation_en-US" xlink:label="lab_cls_AuditInformationAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Audit Information [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_AuditInformationAbstract" xlink:href="cls-20211231.xsd#cls_AuditInformationAbstract"/>
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    <link:label id="lab_cls_LondonInterbankOfferedRateLIBOR1Member_291d8d5c-2dee-4989-987f-fca19102fa82_terseLabel_en-US" xlink:label="lab_cls_LondonInterbankOfferedRateLIBOR1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">London Interbank Offered Rate LIBOR</link:label>
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    <link:label id="lab_cls_LondonInterbankOfferedRateLIBOR1Member_documentation_en-US" xlink:label="lab_cls_LondonInterbankOfferedRateLIBOR1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">London Interbank Offered Rate LIBOR1</link:label>
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    <link:label id="lab_cls_PensionPlanAdjustmentFromChangeInLawMember_5ba666d1-8896-4977-9b41-7f16609f9453_terseLabel_en-US" xlink:label="lab_cls_PensionPlanAdjustmentFromChangeInLawMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pension Plan Adjustment From Change In Law</link:label>
    <link:label id="lab_cls_PensionPlanAdjustmentFromChangeInLawMember_label_en-US" xlink:label="lab_cls_PensionPlanAdjustmentFromChangeInLawMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pension Plan Adjustment From Change In Law [Member]</link:label>
    <link:label id="lab_cls_PensionPlanAdjustmentFromChangeInLawMember_documentation_en-US" xlink:label="lab_cls_PensionPlanAdjustmentFromChangeInLawMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pension Plan Adjustment From Change In Law [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_PensionPlanAdjustmentFromChangeInLawMember" xlink:href="cls-20211231.xsd#cls_PensionPlanAdjustmentFromChangeInLawMember"/>
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    <link:label id="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_9701dcd4-6d5b-44bc-8ad0-934d08ae2b26_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of property, plant and equipment [axis]</link:label>
    <link:label id="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_label_en-US" xlink:label="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of property, plant and equipment [axis]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LevelsOfFairValueHierarchyAxis_628abac2-7e9d-43a1-bf57-066b1500c6ef_terseLabel_en-US" xlink:label="lab_ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Levels of fair value hierarchy [axis]</link:label>
    <link:label id="lab_ifrs-full_LevelsOfFairValueHierarchyAxis_label_en-US" xlink:label="lab_ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Levels of fair value hierarchy [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_LevelsOfFairValueHierarchyAxis"/>
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    <link:label id="lab_cls_IncomeTaxHolidayTermTwo_13823160-f17c-4ce7-8647-dd0e7d8d79fe_terseLabel_en-US" xlink:label="lab_cls_IncomeTaxHolidayTermTwo" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term of tax exemption</link:label>
    <link:label id="lab_cls_IncomeTaxHolidayTermTwo_label_en-US" xlink:label="lab_cls_IncomeTaxHolidayTermTwo" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Holiday, Term Two</link:label>
    <link:label id="lab_cls_IncomeTaxHolidayTermTwo_documentation_en-US" xlink:label="lab_cls_IncomeTaxHolidayTermTwo" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Holiday, Term Two</link:label>
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    <link:label id="lab_cls_PercentageOfDebtHedged_44699615-26fb-428e-8e74-9c0ad800a92d_terseLabel_en-US" xlink:label="lab_cls_PercentageOfDebtHedged" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of debt hedged</link:label>
    <link:label id="lab_cls_PercentageOfDebtHedged_label_en-US" xlink:label="lab_cls_PercentageOfDebtHedged" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of Debt Hedged</link:label>
    <link:label id="lab_cls_PercentageOfDebtHedged_documentation_en-US" xlink:label="lab_cls_PercentageOfDebtHedged" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of Debt Hedged</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_PercentageOfDebtHedged" xlink:href="cls-20211231.xsd#cls_PercentageOfDebtHedged"/>
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    <link:label id="lab_cls_TaxEffectOfRepatriationOfUndistributedEarningsOfSubsidiaries_a17587f6-07a7-45d4-981d-979e46f92095_terseLabel_en-US" xlink:label="lab_cls_TaxEffectOfRepatriationOfUndistributedEarningsOfSubsidiaries" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax affect of repatriated earnings</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_cls_TaxEffectOfRepatriationOfUndistributedEarningsOfSubsidiaries" xlink:href="cls-20211231.xsd#cls_TaxEffectOfRepatriationOfUndistributedEarningsOfSubsidiaries"/>
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    <link:label id="lab_cls_ReductionOfRightOfUseAssetsTenantImprovementAllowances_bb5c6d70-f4be-47ac-8c14-167d92cfd90b_terseLabel_en-US" xlink:label="lab_cls_ReductionOfRightOfUseAssetsTenantImprovementAllowances" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reduction for tenant improvement allowances</link:label>
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    <link:label id="lab_ifrs-full_CurrentTradeReceivables_53cf644d-29cb-49ea-8e5e-6445b29c97d8_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentTradeReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts receivable</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory_715e6d9e-8e14-4a49-bcfd-476e5abe326d_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock-based compensation (SBC)</link:label>
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    <link:label id="lab_cls_IncomeTaxExpenseBenefitReversalOfTaxUncertaintiesOfSubsidiary_22bbc031-c88b-47b2-b70b-62ca76d86a49_terseLabel_en-US" xlink:label="lab_cls_IncomeTaxExpenseBenefitReversalOfTaxUncertaintiesOfSubsidiary" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reversal of tax uncertainties</link:label>
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    <link:label id="lab_cls_IncomeTaxExpenseBenefitReversalOfTaxUncertaintiesOfSubsidiary_documentation_en-US" xlink:label="lab_cls_IncomeTaxExpenseBenefitReversalOfTaxUncertaintiesOfSubsidiary" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Expense (Benefit), Reversal Of Tax Uncertainties Of Subsidiary</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_IncomeTaxExpenseBenefitReversalOfTaxUncertaintiesOfSubsidiary" xlink:href="cls-20211231.xsd#cls_IncomeTaxExpenseBenefitReversalOfTaxUncertaintiesOfSubsidiary"/>
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    <link:label id="lab_cls_LiabilityForPlanBenefitsDefinedBenefitPlansMember_c9a3c9b3-ee62-42bd-99e1-229d3eb9b945_terseLabel_en-US" xlink:label="lab_cls_LiabilityForPlanBenefitsDefinedBenefitPlansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pension and non-pension post-employment liabilities</link:label>
    <link:label id="lab_cls_LiabilityForPlanBenefitsDefinedBenefitPlansMember_label_en-US" xlink:label="lab_cls_LiabilityForPlanBenefitsDefinedBenefitPlansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liability For Plan Benefits, Defined Benefit Plans [Member]</link:label>
    <link:label id="lab_cls_LiabilityForPlanBenefitsDefinedBenefitPlansMember_documentation_en-US" xlink:label="lab_cls_LiabilityForPlanBenefitsDefinedBenefitPlansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liability For Plan Benefits, Defined Benefit Plans [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_LiabilityForPlanBenefitsDefinedBenefitPlansMember" xlink:href="cls-20211231.xsd#cls_LiabilityForPlanBenefitsDefinedBenefitPlansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_LiabilityForPlanBenefitsDefinedBenefitPlansMember" xlink:to="lab_cls_LiabilityForPlanBenefitsDefinedBenefitPlansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption_9c10b403-ab3e-472a-9003-1df56ce267b7_terseLabel_en-US" xlink:label="lab_cls_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount of accordion feature</link:label>
    <link:label id="lab_cls_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption_label_en-US" xlink:label="lab_cls_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line Of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option</link:label>
    <link:label id="lab_cls_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption_documentation_en-US" xlink:label="lab_cls_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line Of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption" xlink:href="cls-20211231.xsd#cls_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption"/>
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    <link:label id="lab_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome_68be674f-0589-431a-873b-04106319acf4_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other, including non-taxable/non-deductible items and changes to net provisions related to tax uncertainties</link:label>
    <link:label id="lab_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome_label_en-US" xlink:label="lab_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other tax effects for reconciliation between accounting profit and tax expense (income)</link:label>
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    <link:label id="lab_ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset_2681ab8d-1f78-4c47-8611-5f256d54dd3e_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">&#8212; Changes in financial assumptions</link:label>
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    <link:label id="lab_cls_ADCGUMember_documentation_en-US" xlink:label="lab_cls_ADCGUMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">A &amp; D CGU [Member]</link:label>
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    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities_e5f52685-64e4-40a8-b468-ace66589e666_totalLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net cash provided by operating activities</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfInventoriesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfInventoriesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of inventories [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfInventoriesExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfInventoriesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfInventoriesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfInventoriesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCurrentReportingStatus_eedf61ab-b61d-4caf-92e9-604098c7719d_terseLabel_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:label id="lab_dei_EntityCurrentReportingStatus_label_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityCurrentReportingStatus"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCurrentReportingStatus" xlink:to="lab_dei_EntityCurrentReportingStatus" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_SaleOfReceivablesUnderFacilityProgramMember_6d4efc97-3538-4302-9646-d3ed703104f9_terseLabel_en-US" xlink:label="lab_cls_SaleOfReceivablesUnderFacilityProgramMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Factoring of receivables from facility program</link:label>
    <link:label id="lab_cls_SaleOfReceivablesUnderFacilityProgramMember_label_en-US" xlink:label="lab_cls_SaleOfReceivablesUnderFacilityProgramMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale Of Receivables Under Facility Program [Member]</link:label>
    <link:label id="lab_cls_SaleOfReceivablesUnderFacilityProgramMember_documentation_en-US" xlink:label="lab_cls_SaleOfReceivablesUnderFacilityProgramMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale Of Receivables Under Facility Program [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_SaleOfReceivablesUnderFacilityProgramMember" xlink:href="cls-20211231.xsd#cls_SaleOfReceivablesUnderFacilityProgramMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_SaleOfReceivablesUnderFacilityProgramMember" xlink:to="lab_cls_SaleOfReceivablesUnderFacilityProgramMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_LesseeLeasesDescriptionTable_70100c10-c7c7-4c4a-8e19-65a6b1e0b50b_terseLabel_en-US" xlink:label="lab_cls_LesseeLeasesDescriptionTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lessee, Leases, Description [Table]</link:label>
    <link:label id="lab_cls_LesseeLeasesDescriptionTable_label_en-US" xlink:label="lab_cls_LesseeLeasesDescriptionTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lessee, Leases, Description [Table]</link:label>
    <link:label id="lab_cls_LesseeLeasesDescriptionTable_documentation_en-US" xlink:label="lab_cls_LesseeLeasesDescriptionTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lessee, Leases, Description [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_LesseeLeasesDescriptionTable" xlink:href="cls-20211231.xsd#cls_LesseeLeasesDescriptionTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_LesseeLeasesDescriptionTable" xlink:to="lab_cls_LesseeLeasesDescriptionTable" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_TaxEffectFromTaxIncentives_40ebe38d-1be1-4ea8-956f-ba3a3479063d_terseLabel_en-US" xlink:label="lab_cls_TaxEffectFromTaxIncentives" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax effect from tax incentives</link:label>
    <link:label id="lab_cls_TaxEffectFromTaxIncentives_label_en-US" xlink:label="lab_cls_TaxEffectFromTaxIncentives" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Effect From Tax Incentives</link:label>
    <link:label id="lab_cls_TaxEffectFromTaxIncentives_documentation_en-US" xlink:label="lab_cls_TaxEffectFromTaxIncentives" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Effect From Tax Incentives</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_TaxEffectFromTaxIncentives" xlink:href="cls-20211231.xsd#cls_TaxEffectFromTaxIncentives"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_TaxEffectFromTaxIncentives" xlink:to="lab_cls_TaxEffectFromTaxIncentives" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_NoncurrentProvisionsAndOtherNoncurrentLiabilities_bcf6016a-c7dd-41f2-9bf8-0b344d9a9357_terseLabel_en-US" xlink:label="lab_cls_NoncurrentProvisionsAndOtherNoncurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provisions and other non-current liabilities</link:label>
    <link:label id="lab_cls_NoncurrentProvisionsAndOtherNoncurrentLiabilities_label_en-US" xlink:label="lab_cls_NoncurrentProvisionsAndOtherNoncurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current Provisions And Other Non-current Liabilities</link:label>
    <link:label id="lab_cls_NoncurrentProvisionsAndOtherNoncurrentLiabilities_documentation_en-US" xlink:label="lab_cls_NoncurrentProvisionsAndOtherNoncurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current Provisions And Other Non-current Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_NoncurrentProvisionsAndOtherNoncurrentLiabilities" xlink:href="cls-20211231.xsd#cls_NoncurrentProvisionsAndOtherNoncurrentLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_NoncurrentProvisionsAndOtherNoncurrentLiabilities" xlink:to="lab_cls_NoncurrentProvisionsAndOtherNoncurrentLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit_d9940edd-40f0-4cec-893b-61f974b2712e_terseLabel_en-US" xlink:label="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Agreement to sell trade receivables, maximum capacity</link:label>
    <link:label id="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit_label_en-US" xlink:label="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfer Of Financial Assets Accounted For As Sales, Maximum Limit</link:label>
    <link:label id="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit_documentation_en-US" xlink:label="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfer Of Financial Assets Accounted For As Sales, Maximum Limit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit" xlink:href="cls-20211231.xsd#cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit" xlink:to="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentAccountingStandard_05b4f818-a8cd-4391-8083-c8c3762607ce_terseLabel_en-US" xlink:label="lab_dei_DocumentAccountingStandard" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Accounting Standard</link:label>
    <link:label id="lab_dei_DocumentAccountingStandard_label_en-US" xlink:label="lab_dei_DocumentAccountingStandard" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Accounting Standard</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentAccountingStandard" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentAccountingStandard"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentAccountingStandard" xlink:to="lab_dei_DocumentAccountingStandard" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TopOfRangeMember_2d21c8c0-58b9-4d1e-9484-95e5f23956ec_terseLabel_en-US" xlink:label="lab_ifrs-full_TopOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Top of range</link:label>
    <link:label id="lab_ifrs-full_TopOfRangeMember_label_en-US" xlink:label="lab_ifrs-full_TopOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Top of range [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_TopOfRangeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TopOfRangeMember" xlink:to="lab_ifrs-full_TopOfRangeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities_6e7fba7a-1574-4fe6-8b27-44414ad65886_totalLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net cash provided by (used in) investing activities</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from (used in) investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_PurchaseOfSharesForCancellationMember_1cc54141-883a-48db-bec8-ebcfb9d9182a_terseLabel_en-US" xlink:label="lab_cls_PurchaseOfSharesForCancellationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of shares for cancellation</link:label>
    <link:label id="lab_cls_PurchaseOfSharesForCancellationMember_label_en-US" xlink:label="lab_cls_PurchaseOfSharesForCancellationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of Shares for Cancellation [Member]</link:label>
    <link:label id="lab_cls_PurchaseOfSharesForCancellationMember_documentation_en-US" xlink:label="lab_cls_PurchaseOfSharesForCancellationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of Shares for Cancellation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_PurchaseOfSharesForCancellationMember" xlink:href="cls-20211231.xsd#cls_PurchaseOfSharesForCancellationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_PurchaseOfSharesForCancellationMember" xlink:to="lab_cls_PurchaseOfSharesForCancellationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PresentValueOfDefinedBenefitObligationMember_df29a8d6-a0e5-44a9-a990-de52d99acd79_terseLabel_en-US" xlink:label="lab_ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued benefit obligations</link:label>
    <link:label id="lab_ifrs-full_PresentValueOfDefinedBenefitObligationMember_label_en-US" xlink:label="lab_ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Present value of defined benefit obligation [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_PresentValueOfDefinedBenefitObligationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:to="lab_ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_country_US_9280a599-168b-4b20-bf38-b9de8cf65927_terseLabel_en-US" xlink:label="lab_country_US" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">United States</link:label>
    <link:label id="lab_country_US_label_en-US" xlink:label="lab_country_US" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">UNITED STATES</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_country_US" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_US"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_US" xlink:to="lab_country_US" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_TwoThousandEighteenNCIBMember_486d3810-5f91-4af0-8e7c-a92124edd8d9_terseLabel_en-US" xlink:label="lab_cls_TwoThousandEighteenNCIBMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2018 NCIB</link:label>
    <link:label id="lab_cls_TwoThousandEighteenNCIBMember_label_en-US" xlink:label="lab_cls_TwoThousandEighteenNCIBMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Two Thousand Eighteen NCIB [Member]</link:label>
    <link:label id="lab_cls_TwoThousandEighteenNCIBMember_documentation_en-US" xlink:label="lab_cls_TwoThousandEighteenNCIBMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Two Thousand Eighteen NCIB [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_TwoThousandEighteenNCIBMember" xlink:href="cls-20211231.xsd#cls_TwoThousandEighteenNCIBMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_TwoThousandEighteenNCIBMember" xlink:to="lab_cls_TwoThousandEighteenNCIBMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory_98cc67bc-9495-4ebe-a7b1-738aedb4c1dc_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance Costs</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of finance income (cost) [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:to="lab_ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_PortionOfConsiderationPaidConsistingOfBorrowings_e3ffc138-3719-42f7-b915-ad26119ba895_terseLabel_en-US" xlink:label="lab_cls_PortionOfConsiderationPaidConsistingOfBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Portion of consideration paid consisting of borrowings</link:label>
    <link:label id="lab_cls_PortionOfConsiderationPaidConsistingOfBorrowings_label_en-US" xlink:label="lab_cls_PortionOfConsiderationPaidConsistingOfBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Portion Of Consideration Paid Consisting Of Borrowings</link:label>
    <link:label id="lab_cls_PortionOfConsiderationPaidConsistingOfBorrowings_documentation_en-US" xlink:label="lab_cls_PortionOfConsiderationPaidConsistingOfBorrowings" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Portion Of Consideration Paid Consisting Of Borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_PortionOfConsiderationPaidConsistingOfBorrowings" xlink:href="cls-20211231.xsd#cls_PortionOfConsiderationPaidConsistingOfBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_PortionOfConsiderationPaidConsistingOfBorrowings" xlink:to="lab_cls_PortionOfConsiderationPaidConsistingOfBorrowings" xlink:type="arc" order="1"/>
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    <link:label id="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_9a7b1f8e-8026-4326-8f53-28f23c5e81a2_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of share options granted in share-based payment arrangement (in shares)</link:label>
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    <link:label id="lab_cls_ConcentrationRiskByBenchmark1Axis_documentation_en-US" xlink:label="lab_cls_ConcentrationRiskByBenchmark1Axis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk By Benchmark1 [Axis]</link:label>
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    <link:label id="lab_ifrs-full_DeferredTaxExpenseIncomeAbstract_edf582ff-e89c-4cbf-8489-af467b05e1cc_terseLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxExpenseIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred income tax expense (recovery):</link:label>
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    <link:label id="lab_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_bd89bc4e-3b3a-4a57-b6ca-17d669330656_terseLabel_en-US" xlink:label="lab_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other benefit plans</link:label>
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    <link:label id="lab_cls_ReleaseOfIndirectTaxLiabilitiesPreviouslyRecordedInConnectionWithAPreviousAcquisitionRecognizedInAcquisitionCosts_a3b1a67a-eca6-4934-9c5a-961d328befd7_terseLabel_en-US" xlink:label="lab_cls_ReleaseOfIndirectTaxLiabilitiesPreviouslyRecordedInConnectionWithAPreviousAcquisitionRecognizedInAcquisitionCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment of acquisition costs related to indirect tax liabilities recognized</link:label>
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    <link:label id="lab_ifrs-full_SharePremium_75a56afb-837c-447f-abb9-e781978640a1_terseLabel_en-US" xlink:label="lab_ifrs-full_SharePremium" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contributed surplus</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:to="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncomeStatementAbstract_df69e229-3564-493c-bc37-61ad7b96038b_terseLabel_en-US" xlink:label="lab_ifrs-full_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit or loss [abstract]</link:label>
    <link:label id="lab_ifrs-full_IncomeStatementAbstract_label_en-US" xlink:label="lab_ifrs-full_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit or loss [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeStatementAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IncomeStatementAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncomeStatementAbstract" xlink:to="lab_ifrs-full_IncomeStatementAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan_b18ccb51-8928-43ba-93ee-79ae67e4b45c_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net pension assets</link:label>
    <link:label id="lab_ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan_2cdc1cfc-631b-4a3b-888f-6087a96a9225_verboseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current net defined benefit asset (note 9)</link:label>
    <link:label id="lab_ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan_label_en-US" xlink:label="lab_ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current net defined benefit asset</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan" xlink:to="lab_ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_AcquisitionCostRelatedToTheSubsequentReMeasurementOfIndemnificationAssets_8a263d3f-4bb6-4c5d-807f-3945c2352100_terseLabel_en-US" xlink:label="lab_cls_AcquisitionCostRelatedToTheSubsequentReMeasurementOfIndemnificationAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition cost related to the subsequent re-measurement of indemnification assets</link:label>
    <link:label id="lab_cls_AcquisitionCostRelatedToTheSubsequentReMeasurementOfIndemnificationAssets_label_en-US" xlink:label="lab_cls_AcquisitionCostRelatedToTheSubsequentReMeasurementOfIndemnificationAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition Cost Related To The Subsequent Re-measurement Of Indemnification Assets</link:label>
    <link:label id="lab_cls_AcquisitionCostRelatedToTheSubsequentReMeasurementOfIndemnificationAssets_documentation_en-US" xlink:label="lab_cls_AcquisitionCostRelatedToTheSubsequentReMeasurementOfIndemnificationAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition Cost Related To The Subsequent Re-measurement Of Indemnification Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_AcquisitionCostRelatedToTheSubsequentReMeasurementOfIndemnificationAssets" xlink:href="cls-20211231.xsd#cls_AcquisitionCostRelatedToTheSubsequentReMeasurementOfIndemnificationAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_AcquisitionCostRelatedToTheSubsequentReMeasurementOfIndemnificationAssets" xlink:to="lab_cls_AcquisitionCostRelatedToTheSubsequentReMeasurementOfIndemnificationAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_BottomOfRangeMember_cff24151-5dee-4edd-857a-28634c278586_terseLabel_en-US" xlink:label="lab_ifrs-full_BottomOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bottom of range</link:label>
    <link:label id="lab_ifrs-full_BottomOfRangeMember_label_en-US" xlink:label="lab_ifrs-full_BottomOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bottom of range [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BottomOfRangeMember" xlink:to="lab_ifrs-full_BottomOfRangeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares_b94f51e8-ca46-499c-8c11-153c1e25d4d8_terseLabel_en-US" xlink:label="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dilutive effect of outstanding awards under SBC plans (in shares)</link:label>
    <link:label id="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares_label_en-US" xlink:label="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dilutive effect of share options on number of ordinary shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:to="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_RangeAxis_ab0afe8b-d7ea-4014-9a78-09c339dbae72_terseLabel_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
    <link:label id="lab_srt_RangeAxis_label_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeAxis" xlink:to="lab_srt_RangeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_MachineryAndEquipment1Member_d8bd8c43-bffe-4406-8b38-4eaba1156eb1_terseLabel_en-US" xlink:label="lab_cls_MachineryAndEquipment1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Machinery and equipment</link:label>
    <link:label id="lab_cls_MachineryAndEquipment1Member_label_en-US" xlink:label="lab_cls_MachineryAndEquipment1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Machinery And Equipment1 [Member]</link:label>
    <link:label id="lab_cls_MachineryAndEquipment1Member_documentation_en-US" xlink:label="lab_cls_MachineryAndEquipment1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Machinery and Equipment [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_MachineryAndEquipment1Member" xlink:href="cls-20211231.xsd#cls_MachineryAndEquipment1Member"/>
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    <link:label id="lab_ifrs-full_RentalExpense_0cd8e0d0-79cb-4c11-8921-c9b8157a16ba_terseLabel_en-US" xlink:label="lab_ifrs-full_RentalExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rental expense</link:label>
    <link:label id="lab_ifrs-full_RentalExpense_label_en-US" xlink:label="lab_ifrs-full_RentalExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rental expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RentalExpense" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RentalExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RentalExpense" xlink:to="lab_ifrs-full_RentalExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets_fdf8be03-48c9-4d90-8ac8-c5cfa14a1f3e_terseLabel_en-US" xlink:label="lab_ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Allowance for doubtful accounts</link:label>
    <link:label id="lab_ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets_label_en-US" xlink:label="lab_ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Allowance account for credit losses of financial assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets" xlink:to="lab_ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForFinanceCostsExplanatory_35132b39-a7c6-4a21-9b97-2dd3fa29c19b_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForFinanceCostsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred financing costs</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForFinanceCostsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForFinanceCostsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for finance costs [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfAccountingPolicyForFinanceCostsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFinanceCostsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DescriptionOfAccountingPolicyForFinanceCostsExplanatory" xlink:to="lab_ifrs-full_DescriptionOfAccountingPolicyForFinanceCostsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_b5513ead-93cb-422b-9bd2-71a315ac7635_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of defined benefit plans [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of defined benefit plans [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:to="lab_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_6a8dac25-c1a8-4d11-bb88-5a008662fb0d_terseLabel_en-US" xlink:label="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions</link:label>
    <link:label id="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_label_en-US" xlink:label="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions other than through business combinations, intangible assets other than goodwill</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:to="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_HedgedItemSubjectToCancellationLiabilities_4bc160fd-67a4-431c-97ef-34d33784d1a1_terseLabel_en-US" xlink:label="lab_cls_HedgedItemSubjectToCancellationLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedged item, subject to cancellation</link:label>
    <link:label id="lab_cls_HedgedItemSubjectToCancellationLiabilities_label_en-US" xlink:label="lab_cls_HedgedItemSubjectToCancellationLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedged Item, Subject To Cancellation, Liabilities</link:label>
    <link:label id="lab_cls_HedgedItemSubjectToCancellationLiabilities_documentation_en-US" xlink:label="lab_cls_HedgedItemSubjectToCancellationLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedged Item, Subject To Cancellation, Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_HedgedItemSubjectToCancellationLiabilities" xlink:href="cls-20211231.xsd#cls_HedgedItemSubjectToCancellationLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_HedgedItemSubjectToCancellationLiabilities" xlink:to="lab_cls_HedgedItemSubjectToCancellationLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DeferredTaxLiabilities_1206caac-362e-4728-b132-9054968af836_terseLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred income taxes</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxLiabilities_eb47df56-8130-4b91-90b0-7a4ec0c04353_periodStartLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxLiabilities" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax liabilities, beginning balance</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxLiabilities_c3e700a8-327b-4727-8e63-02cc916975a9_periodEndLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxLiabilities" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax liabilities, ending balance</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxLiabilities_label_en-US" xlink:label="lab_ifrs-full_DeferredTaxLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DeferredTaxLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DeferredTaxLiabilities" xlink:to="lab_ifrs-full_DeferredTaxLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ScenarioUnspecifiedDomain_d7f8f128-59bb-47a6-a92e-10187422d67c_terseLabel_en-US" xlink:label="lab_srt_ScenarioUnspecifiedDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Scenario [Domain]</link:label>
    <link:label id="lab_srt_ScenarioUnspecifiedDomain_label_en-US" xlink:label="lab_srt_ScenarioUnspecifiedDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Scenario [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
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    <link:label id="lab_cls_FinancingReceivablePercentPastDue2_2673a234-ab36-4b83-936d-15cc2e39fd68_terseLabel_en-US" xlink:label="lab_cls_FinancingReceivablePercentPastDue2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percent of gross accounts receivable over 90 days past due (less than in 2019)</link:label>
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    <link:label id="lab_dei_EntityAddressesAddressTypeAxis_635f5c86-b5dc-49d4-b9a8-aa593bea3dac_terseLabel_en-US" xlink:label="lab_dei_EntityAddressesAddressTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Addresses, Address Type [Axis]</link:label>
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    <link:label id="lab_cls_MultipleVotingSharesMember_14891d2d-499e-4508-88ce-7ad87c7ec485_terseLabel_en-US" xlink:label="lab_cls_MultipleVotingSharesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">MVS</link:label>
    <link:label id="lab_cls_MultipleVotingSharesMember_42a34c85-dcf9-409a-9ca4-7e21b10844fa_verboseLabel_en-US" xlink:label="lab_cls_MultipleVotingSharesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Multiple voting shares</link:label>
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    <link:label id="lab_cls_NetDeferredTaxAssetsRelatingToSubsidiary_30c26e04-c3ac-4bf3-99e6-32bea14bfe24_terseLabel_en-US" xlink:label="lab_cls_NetDeferredTaxAssetsRelatingToSubsidiary" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net deferred tax assets relating to subsidiary</link:label>
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    <link:label id="lab_ifrs-full_OtherExpenseByFunction_8278e2e6-ccf5-47d4-a7e2-1ba96aad7957_totalLabel_en-US" xlink:label="lab_ifrs-full_OtherExpenseByFunction" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other expense</link:label>
    <link:label id="lab_ifrs-full_OtherExpenseByFunction_931880d3-5c11-43fb-a094-6dd104446fff_verboseLabel_en-US" xlink:label="lab_ifrs-full_OtherExpenseByFunction" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other charges (recoveries) (note 15)</link:label>
    <link:label id="lab_ifrs-full_OtherExpenseByFunction_label_en-US" xlink:label="lab_ifrs-full_OtherExpenseByFunction" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other expense, by function</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherExpenseByFunction" xlink:to="lab_ifrs-full_OtherExpenseByFunction" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfSharesOwnedByIndividual_b8196832-80b9-4ca0-a299-6f2f0ed5cedf_terseLabel_en-US" xlink:label="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfSharesOwnedByIndividual" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares owned by Mr. Etherington (in shares)</link:label>
    <link:label id="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfSharesOwnedByIndividual_label_en-US" xlink:label="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfSharesOwnedByIndividual" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Number Of Shares Owned By Individual</link:label>
    <link:label id="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfSharesOwnedByIndividual_documentation_en-US" xlink:label="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfSharesOwnedByIndividual" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Number Of Shares Owned By Individual</link:label>
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    <link:label id="lab_ifrs-full_AtFairValueMember_badd490a-a3c8-437a-9c2c-b3a8e7c7e5d7_terseLabel_en-US" xlink:label="lab_ifrs-full_AtFairValueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair value</link:label>
    <link:label id="lab_ifrs-full_AtFairValueMember_label_en-US" xlink:label="lab_ifrs-full_AtFairValueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">At fair value [member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AtFairValueMember" xlink:to="lab_ifrs-full_AtFairValueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_ec56ef7e-becc-4539-a6e2-669d4d8a876f_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2025</link:label>
    <link:label id="lab_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_label_en-US" xlink:label="lab_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later than three years and not later than four years [member]</link:label>
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    <link:label id="lab_dei_EntityIncorporationStateCountryCode_07df2e08-3d58-40e9-a903-5017302378ba_terseLabel_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_label_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
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    <link:label id="lab_ifrs-full_MajorCustomersMember_09e3c153-b041-4278-bd07-2d1a71b65a71_terseLabel_en-US" xlink:label="lab_ifrs-full_MajorCustomersMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customers</link:label>
    <link:label id="lab_ifrs-full_MajorCustomersMember_label_en-US" xlink:label="lab_ifrs-full_MajorCustomersMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customers [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MajorCustomersMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_MajorCustomersMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_MajorCustomersMember" xlink:to="lab_ifrs-full_MajorCustomersMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption_d627a737-9464-4d38-8707-d55c82a56de2_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">1% Increase</link:label>
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    <link:label id="lab_cls_DefinedBenefitPlanAssumedHealthCareCostTrendRates1Abstract_38160a77-630e-4b1f-9abb-07275f40494e_terseLabel_en-US" xlink:label="lab_cls_DefinedBenefitPlanAssumedHealthCareCostTrendRates1Abstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Healthcare cost trend rates:</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_cls_DefinedBenefitPlanAssumedHealthCareCostTrendRates1Abstract" xlink:href="cls-20211231.xsd#cls_DefinedBenefitPlanAssumedHealthCareCostTrendRates1Abstract"/>
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    <link:label id="lab_ifrs-full_ComprehensiveIncomeAbstract_d32d604b-3f3f-4eb9-ad77-87c91b4c2f53_terseLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total comprehensive income:</link:label>
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    <link:label id="lab_ifrs-full_StatementOfChangesInEquityLineItems_33e55a88-c375-4862-b27f-7f2665a2f39c_terseLabel_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of changes in equity [line items]</link:label>
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    <link:label id="lab_ifrs-full_CurrentAssetsAbstract_36d83b2f-6159-4e2e-bee0-3c16d3879363_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current assets:</link:label>
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    <link:label id="lab_cls_IncreaseDecreaseThroughAccretionandNetExchangeDifferencesOtherProvisions_d778fa0f-faf2-4537-aad8-289e2e360c69_terseLabel_en-US" xlink:label="lab_cls_IncreaseDecreaseThroughAccretionandNetExchangeDifferencesOtherProvisions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accretion, foreign exchange and other</link:label>
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    <link:label id="lab_ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset_763ad02e-6566-411e-90cd-dfcf69be97f3_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">&#8212; Experience adjustments</link:label>
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    <link:label id="lab_cls_DeferredTaxRelatingToItemsCreditedChargedDirectlyToEquityDeferredTaxAssets_6ddf7df6-3fd7-44a5-9971-81d8b4ed1632_terseLabel_en-US" xlink:label="lab_cls_DeferredTaxRelatingToItemsCreditedChargedDirectlyToEquityDeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credited (charged) directly to equity</link:label>
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    <link:label id="lab_ifrs-full_TaxExpenseIncomeAtApplicableTaxRate_8a677903-1628-4a10-881b-09e70959680c_terseLabel_en-US" xlink:label="lab_ifrs-full_TaxExpenseIncomeAtApplicableTaxRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax expense at Celestica&#8217;s statutory income tax rate of 26.5% (2019 - 2021)</link:label>
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    <link:label id="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_2969edf1-57fc-47cd-aba3-378342b02fe7_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for segment consolidation items</link:label>
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    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract_778ae611-e8ce-44d6-b7f8-eae1531eb8c4_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financing activities:</link:label>
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    <link:label id="lab_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_677bb842-aea6-4723-952a-877756fa6bbb_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares outstanding (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_label_en-US" xlink:label="lab_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of other equity instruments outstanding in share-based payment arrangement</link:label>
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    <link:label id="lab_cls_GainonSaleofTorontoPropertyMember_23655c85-dcd8-4198-9eb8-6b7ff2bb77e5_terseLabel_en-US" xlink:label="lab_cls_GainonSaleofTorontoPropertyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain on Sale of Toronto Property</link:label>
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    <link:label id="lab_cls_GainonSaleofTorontoPropertyMember_documentation_en-US" xlink:label="lab_cls_GainonSaleofTorontoPropertyMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain on Sale of Toronto Property [Member]</link:label>
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    <link:label id="lab_ifrs-full_NumberOfOutstandingShareOptions_7b8b3ef9-6960-4b0b-a38d-85eecfca715a_periodEndLabel_en-US" xlink:label="lab_ifrs-full_NumberOfOutstandingShareOptions" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Outstanding, ending balance (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfOutstandingShareOptions_b31661e1-cb7b-4887-831d-04d442321ffd_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfOutstandingShareOptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Outstanding Options (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfOutstandingShareOptions_label_en-US" xlink:label="lab_ifrs-full_NumberOfOutstandingShareOptions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of share options outstanding in share-based payment arrangement</link:label>
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    <link:label id="lab_ifrs-full_InterestRateTypesMember_0aa26a5c-a591-444f-b498-54c1acded266_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestRateTypesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest rate types</link:label>
    <link:label id="lab_ifrs-full_InterestRateTypesMember_label_en-US" xlink:label="lab_ifrs-full_InterestRateTypesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest rate types [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestRateTypesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_InterestRateTypesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InterestRateTypesMember" xlink:to="lab_ifrs-full_InterestRateTypesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GrossProfit_0462767c-0219-45b8-bdf5-87c5b77722b0_totalLabel_en-US" xlink:label="lab_ifrs-full_GrossProfit" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross profit</link:label>
    <link:label id="lab_ifrs-full_GrossProfit_label_en-US" xlink:label="lab_ifrs-full_GrossProfit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross profit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossProfit" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_GrossProfit"/>
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    <link:label id="lab_cls_PaymentOfInterestExpenseAndDebtIssuanceCosts_0791c71e-e13e-437b-9bea-a1bd0c7e3c9a_terseLabel_en-US" xlink:label="lab_cls_PaymentOfInterestExpenseAndDebtIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment of finance costs</link:label>
    <link:label id="lab_cls_PaymentOfInterestExpenseAndDebtIssuanceCosts_label_en-US" xlink:label="lab_cls_PaymentOfInterestExpenseAndDebtIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment Of Interest Expense And Debt Issuance Costs</link:label>
    <link:label id="lab_cls_PaymentOfInterestExpenseAndDebtIssuanceCosts_documentation_en-US" xlink:label="lab_cls_PaymentOfInterestExpenseAndDebtIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment Of Interest Expense And Debt Issuance Costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_PaymentOfInterestExpenseAndDebtIssuanceCosts" xlink:href="cls-20211231.xsd#cls_PaymentOfInterestExpenseAndDebtIssuanceCosts"/>
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    <link:label id="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_e7a86e59-7f28-44a6-b204-d299a064e6b6_periodStartLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average exercise price, beginning balance (in dollars per share)</link:label>
    <link:label id="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_5867c1e2-ae83-41f5-ba8a-af9a9bbd8dc1_periodEndLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average exercise price, beginning balance (in dollars per share)</link:label>
    <link:label id="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_9bbbc64f-3f89-4640-803b-6713c2899496_terseLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average exercise price of share options outstanding in share-based payment arrangement (in dollars per share)</link:label>
    <link:label id="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_label_en-US" xlink:label="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average exercise price of share options outstanding in share-based payment arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019"/>
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    <link:label id="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesTermRequiredNoticeBeforeTermination_8da6762d-4b0f-4682-8d50-3e4e86f77ee3_terseLabel_en-US" xlink:label="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesTermRequiredNoticeBeforeTermination" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notice before termination</link:label>
    <link:label id="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesTermRequiredNoticeBeforeTermination_label_en-US" xlink:label="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesTermRequiredNoticeBeforeTermination" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfer Of Financial Assets Accounted For As Sales, Term Required Notice Before Termination</link:label>
    <link:label id="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesTermRequiredNoticeBeforeTermination_documentation_en-US" xlink:label="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesTermRequiredNoticeBeforeTermination" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfer Of Financial Assets Accounted For As Sales, Term Required Notice Before Termination</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_TransferOfFinancialAssetsAccountedForAsSalesTermRequiredNoticeBeforeTermination" xlink:href="cls-20211231.xsd#cls_TransferOfFinancialAssetsAccountedForAsSalesTermRequiredNoticeBeforeTermination"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_TransferOfFinancialAssetsAccountedForAsSalesTermRequiredNoticeBeforeTermination" xlink:to="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesTermRequiredNoticeBeforeTermination" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_PercentOfRevenueContributedByAcquireeAsIfCombinationOccurredAtBeginningOfPeriod_7ba2d912-d5d3-4255-9645-d1bcb5a68055_terseLabel_en-US" xlink:label="lab_cls_PercentOfRevenueContributedByAcquireeAsIfCombinationOccurredAtBeginningOfPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percent of revenue contributed by acquiree as if combination occurred at beginning of period</link:label>
    <link:label id="lab_cls_PercentOfRevenueContributedByAcquireeAsIfCombinationOccurredAtBeginningOfPeriod_label_en-US" xlink:label="lab_cls_PercentOfRevenueContributedByAcquireeAsIfCombinationOccurredAtBeginningOfPeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percent Of Revenue Contributed By Acquiree As If Combination Occurred At Beginning Of Period</link:label>
    <link:label id="lab_cls_PercentOfRevenueContributedByAcquireeAsIfCombinationOccurredAtBeginningOfPeriod_documentation_en-US" xlink:label="lab_cls_PercentOfRevenueContributedByAcquireeAsIfCombinationOccurredAtBeginningOfPeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percent Of Revenue Contributed By Acquiree As If Combination Occurred At Beginning Of Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_PercentOfRevenueContributedByAcquireeAsIfCombinationOccurredAtBeginningOfPeriod" xlink:href="cls-20211231.xsd#cls_PercentOfRevenueContributedByAcquireeAsIfCombinationOccurredAtBeginningOfPeriod"/>
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    <link:label id="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities_f2ed8360-3ee6-4632-ba2f-9cacf59e1679_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities_label_en-US" xlink:label="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other inflows (outflows) of cash, classified as operating activities</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:to="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinancialLiabilities_4c32e073-88bb-46e8-85fa-b392b6abd484_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities:</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilities_label_en-US" xlink:label="lab_ifrs-full_FinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FinancialLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialLiabilities" xlink:to="lab_ifrs-full_FinancialLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_TreasuryStockSharesAcquiredHeldByTrustee_7f34d307-1e3f-48b1-b68f-93cd3891d6f0_terseLabel_en-US" xlink:label="lab_cls_TreasuryStockSharesAcquiredHeldByTrustee" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of SVS held by trustee for delivery under SBC plans (in shares)</link:label>
    <link:label id="lab_cls_TreasuryStockSharesAcquiredHeldByTrustee_label_en-US" xlink:label="lab_cls_TreasuryStockSharesAcquiredHeldByTrustee" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Treasury Stock, Shares, Acquired, Held By Trustee</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_cls_TreasuryStockSharesAcquiredHeldByTrustee" xlink:href="cls-20211231.xsd#cls_TreasuryStockSharesAcquiredHeldByTrustee"/>
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    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis_891c7864-b5cd-42ae-9bc3-511d4aa8a6f9_terseLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment by operating lease status [axis]</link:label>
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    <link:label id="lab_ifrs-full_EstimatedFinancialEffectOfContingentLiabilities_35f74486-fc0e-42e6-be32-62e848b431d4_terseLabel_en-US" xlink:label="lab_ifrs-full_EstimatedFinancialEffectOfContingentLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Estimated financial effect of contingent liabilities</link:label>
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    <link:label id="lab_cls_RelatedPartyAbstract_d7773ac1-f8d6-4ebb-a12c-ec716d83808a_terseLabel_en-US" xlink:label="lab_cls_RelatedPartyAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party [Abstract]</link:label>
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    <link:label id="lab_cls_RelatedPartyAbstract_documentation_en-US" xlink:label="lab_cls_RelatedPartyAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party</link:label>
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    <link:label id="lab_cls_MaximumLengthOfTimeHedgedInCashFlowHedge_4a35f8e6-c83c-4cb3-b926-9e32c6e6e3d4_terseLabel_en-US" xlink:label="lab_cls_MaximumLengthOfTimeHedgedInCashFlowHedge" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum period in months</link:label>
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    <link:label id="lab_ifrs-full_ContractAssets_c72fd665-0450-4532-9059-e3eb416bf7e1_terseLabel_en-US" xlink:label="lab_ifrs-full_ContractAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract assets</link:label>
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    <link:label id="lab_ifrs-full_EntitysTotalForCashgeneratingUnitsMember_16cca0c4-f0cf-45c1-aedb-bbf387eca4a8_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for cash-generating units</link:label>
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    <link:label id="lab_cls_UsefulLivesOrDepreciationRatesPropertyPlantAndEquipmentPeriod_18b7b92b-9e1d-4516-8614-570f27a6bd8d_terseLabel_en-US" xlink:label="lab_cls_UsefulLivesOrDepreciationRatesPropertyPlantAndEquipmentPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Useful life of property, plant and equipment</link:label>
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    <link:label id="lab_cls_UsefulLivesOrDepreciationRatesPropertyPlantAndEquipmentPeriod_documentation_en-US" xlink:label="lab_cls_UsefulLivesOrDepreciationRatesPropertyPlantAndEquipmentPeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Useful Lives Or Depreciation Rates, Property, Plant And Equipment, Period</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_8e3603bc-3283-435a-8cd8-eea09f3d713e_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity-settled stock-based compensation (SBC)</link:label>
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    <link:label id="lab_cls_DisclosureOfInformationOfTheNetBookValueOfRightOfUseAssetTableTextBlock_b27e961a-a750-49d8-b611-eaadfd534c20_terseLabel_en-US" xlink:label="lab_cls_DisclosureOfInformationOfTheNetBookValueOfRightOfUseAssetTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Information Of The Net Book Value Of Right-Of-Use Asset</link:label>
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    <link:label id="lab_ifrs-full_StatementOfFinancialPositionAbstract_3da1bb99-8dbe-4584-a258-5f3008f0e238_terseLabel_en-US" xlink:label="lab_ifrs-full_StatementOfFinancialPositionAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of financial position [abstract]</link:label>
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    <link:label id="lab_srt_MinimumMember_2c6bddd2-fe8a-4db3-9af1-3ca179917cf3_terseLabel_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum</link:label>
    <link:label id="lab_srt_MinimumMember_label_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
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    <link:label id="lab_ifrs-full_NonadjustingEventsMember_e233103f-abcb-4f6d-9ad2-b31182264151_terseLabel_en-US" xlink:label="lab_ifrs-full_NonadjustingEventsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-adjusting events after reporting period</link:label>
    <link:label id="lab_ifrs-full_NonadjustingEventsMember_label_en-US" xlink:label="lab_ifrs-full_NonadjustingEventsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-adjusting events after reporting period [member]</link:label>
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    <link:label id="lab_cls_PercentageOfEntitysProfitLossFromOperatingActivities_63ef6cce-6bc6-419e-bda1-d525bdf53ab4_terseLabel_en-US" xlink:label="lab_cls_PercentageOfEntitysProfitLossFromOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment margin (as a percentage)</link:label>
    <link:label id="lab_cls_PercentageOfEntitysProfitLossFromOperatingActivities_label_en-US" xlink:label="lab_cls_PercentageOfEntitysProfitLossFromOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage Of Entity's Profit (Loss) From Operating Activities</link:label>
    <link:label id="lab_cls_PercentageOfEntitysProfitLossFromOperatingActivities_documentation_en-US" xlink:label="lab_cls_PercentageOfEntitysProfitLossFromOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage Of Entity's Profit (Loss) From Operating Activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_PercentageOfEntitysProfitLossFromOperatingActivities" xlink:href="cls-20211231.xsd#cls_PercentageOfEntitysProfitLossFromOperatingActivities"/>
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    <link:label id="lab_ifrs-full_ClassesOfFinancialAssetsAxis_f41ae53d-4ce2-4864-94f1-b4c1e17662a5_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfFinancialAssetsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of financial assets [axis]</link:label>
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    <link:label id="lab_cls_DisclosureOfAccountingPolicyForNewAccountingPronouncementsPolicyTextBlock_1da8c2b9-2cee-4115-9f37-c26e75dfbe98_terseLabel_en-US" xlink:label="lab_cls_DisclosureOfAccountingPolicyForNewAccountingPronouncementsPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Recently issued accounting standards and amendments</link:label>
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    <link:label id="lab_ifrs-full_ActuarialAssumptionOfMedicalCostTrendRatesMember_91196a56-3eb5-4a0d-8f4f-749cb25896b2_terseLabel_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionOfMedicalCostTrendRatesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Healthcare cost trend rate</link:label>
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    <link:label id="lab_ifrs-full_NumberOfSharesOutstanding_a1c965c4-cf58-4610-87c3-9ee775fbd241_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares outstanding</link:label>
    <link:label id="lab_ifrs-full_NumberOfSharesOutstanding_label_en-US" xlink:label="lab_ifrs-full_NumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesOutstanding" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_NumberOfSharesOutstanding"/>
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    <link:label id="lab_cls_IntangibleAssetsLessComputerSoftwareMember_901ae238-c0e9-4c54-89d0-1ff1aee67ac0_terseLabel_en-US" xlink:label="lab_cls_IntangibleAssetsLessComputerSoftwareMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets, excluding computer software</link:label>
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    <link:label id="lab_cls_CurrentTaxAssetsMember_ae805002-4007-4515-8ae1-1225efcd4158_terseLabel_en-US" xlink:label="lab_cls_CurrentTaxAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes and value-added taxes receivable</link:label>
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    <link:label id="lab_ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax_12d31ed8-543d-4cdc-a4fa-1603fc9b5f1d_terseLabel_en-US" xlink:label="lab_ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reclassification of net loss (gain) on cash flow hedges to operations</link:label>
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    <link:label id="lab_ifrs-full_RightofuseAssets_11ce714f-c923-47ee-ab22-4da3efac9f97_terseLabel_en-US" xlink:label="lab_ifrs-full_RightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right-of-use assets</link:label>
    <link:label id="lab_ifrs-full_RightofuseAssets_503d6715-e1ba-458f-9932-49316ac45c52_periodStartLabel_en-US" xlink:label="lab_ifrs-full_RightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_ifrs-full_RightofuseAssets_24652008-b5df-423e-b75b-adb7348f962c_periodEndLabel_en-US" xlink:label="lab_ifrs-full_RightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_ifrs-full_RightofuseAssets_label_en-US" xlink:label="lab_ifrs-full_RightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right-of-use assets</link:label>
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    <link:label id="lab_cls_GovernmentSubsidiesCOVID19_6c20ee36-30a2-4286-8611-f4c36a7a8b9f_terseLabel_en-US" xlink:label="lab_cls_GovernmentSubsidiesCOVID19" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Government subsidies, COVID - 19</link:label>
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    <link:label id="lab_cls_GovernmentSubsidiesCOVID19_documentation_en-US" xlink:label="lab_cls_GovernmentSubsidiesCOVID19" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Government Subsidies, COVID - 19</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory_7e16292d-cfe9-4c78-9048-c4c5bd07c00c_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Assumptions For Annual Impairment Assessments of Goodwill</link:label>
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    <link:label id="lab_cls_ConnectivityCloudSolutionsMember_d44d330d-f8f6-4837-83fa-23f9a30cc92d_terseLabel_en-US" xlink:label="lab_cls_ConnectivityCloudSolutionsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CCS</link:label>
    <link:label id="lab_cls_ConnectivityCloudSolutionsMember_label_en-US" xlink:label="lab_cls_ConnectivityCloudSolutionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Connectivity &amp; Cloud Solutions [Member]</link:label>
    <link:label id="lab_cls_ConnectivityCloudSolutionsMember_documentation_en-US" xlink:label="lab_cls_ConnectivityCloudSolutionsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Connectivity &amp; Cloud Solutions [Member]</link:label>
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    <link:label id="lab_cls_OptionLifeSharesGrantedTerm_7a3d6868-b252-439c-946f-c51120d8e1e3_terseLabel_en-US" xlink:label="lab_cls_OptionLifeSharesGrantedTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Option life, share options granted</link:label>
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    <link:label id="lab_ifrs-full_GainsOnChangeInFairValueOfDerivatives_274dfd1b-c02b-49de-ac22-b37c5160fa0a_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsOnChangeInFairValueOfDerivatives" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains on change in fair value of derivatives</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_d21196f2-0708-45d0-a7e7-acb08897407a_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of transactions between related parties [line items]</link:label>
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    <link:label id="lab_ifrs-full_ReversalOfInventoryWritedown_6fcfae58-9ac6-4a95-8c1d-3d1f9ba9eb9f_terseLabel_en-US" xlink:label="lab_ifrs-full_ReversalOfInventoryWritedown" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reversal of inventory write-down</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersExplanatory_9503382f-6639-44d9-84ab-08bdecdd0a58_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenues by Reportable Segment</link:label>
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    <link:label id="lab_cls_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear1_099ee845-4a4a-4235-a6a0-49078cd3fd94_terseLabel_en-US" xlink:label="lab_cls_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Immediate trend</link:label>
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    <link:label id="lab_ifrs-full_MeasurementAxis_label_en-US" xlink:label="lab_ifrs-full_MeasurementAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Measurement [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MeasurementAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_MeasurementAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_MeasurementAxis" xlink:to="lab_ifrs-full_MeasurementAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract_70db7aa3-b01f-4ed0-9f7f-b3f0dc5058d5_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investing activities:</link:label>
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    <link:label id="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_9b065dd6-4981-4748-985d-56a333e171c3_negatedPeriodStartLabel_en-US" xlink:label="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:role="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan assets, beginning of year</link:label>
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    <link:label id="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_218d06c7-a6f3-4396-aec3-b704d2e726f6_periodStartLabel_en-US" xlink:label="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued benefit obligations, beginning of year</link:label>
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    <link:label id="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_label_en-US" xlink:label="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net defined benefit liability (asset)</link:label>
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    <link:label id="lab_ifrs-full_CurrentLiabilitiesAbstract_3ee1c949-e4ab-4e00-b73c-11d6abdab8a6_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current liabilities:</link:label>
    <link:label id="lab_ifrs-full_CurrentLiabilitiesAbstract_label_en-US" xlink:label="lab_ifrs-full_CurrentLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current liabilities [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilitiesAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CurrentLiabilitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentLiabilitiesAbstract" xlink:to="lab_ifrs-full_CurrentLiabilitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures_fd4099eb-a2fe-47d8-9353-b43a2ce6de5e_terseLabel_en-US" xlink:label="lab_ifrs-full_TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Temporary differences associated with investments in subsidiaries for which no deferred tax liabilities have been recognized</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfIntangibleAssetsAndGoodwillExplanatory_85e09830-ffda-48f2-9ba4-9cbbd2dbcc2a_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfIntangibleAssetsAndGoodwillExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill and Intangible Assets</link:label>
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    <link:label id="lab_ifrs-full_OtherNoncurrentAssets_3f12ff8d-bc56-4a4f-8949-ad2f3250b878_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other non-current assets</link:label>
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    <link:label id="lab_cls_IncrementalSwapsMember_9241ce0c-9039-40d4-8083-1a2c3545ae30_terseLabel_en-US" xlink:label="lab_cls_IncrementalSwapsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Incremental Swaps</link:label>
    <link:label id="lab_cls_IncrementalSwapsMember_label_en-US" xlink:label="lab_cls_IncrementalSwapsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Incremental Swaps [Member]</link:label>
    <link:label id="lab_cls_IncrementalSwapsMember_documentation_en-US" xlink:label="lab_cls_IncrementalSwapsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Incremental Swaps</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_IncrementalSwapsMember" xlink:href="cls-20211231.xsd#cls_IncrementalSwapsMember"/>
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    <link:label id="lab_ifrs-full_DisclosureOfFairValueMeasurementOfAssetsExplanatory_e6b25f9d-9502-460f-9996-9ce9c36690f4_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFairValueMeasurementOfAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Fair Value Measurement of Assets</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFairValueMeasurementOfAssetsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFairValueMeasurementOfAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of fair value measurement of assets [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFairValueMeasurementOfAssetsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfAssetsExplanatory"/>
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    <link:label id="lab_ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis_a1b96636-a543-407e-8dab-f8f04e643b80_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of intangible assets and goodwill [axis]</link:label>
    <link:label id="lab_ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis_label_en-US" xlink:label="lab_ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of intangible assets and goodwill [axis]</link:label>
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    <link:label id="lab_cls_LeasePeriodOne512023To4302033Member_11b8e218-c698-499e-a26c-3db71d19ff1c_terseLabel_en-US" xlink:label="lab_cls_LeasePeriodOne512023To4302033Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5/1/2023 to 4/30/2033</link:label>
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    <link:label id="lab_ifrs-full_NewIFRSsAxis_adc9fe6a-9dd6-4382-9460-32fe6f9de2ae_terseLabel_en-US" xlink:label="lab_ifrs-full_NewIFRSsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New IFRSs [axis]</link:label>
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    <link:label id="lab_ifrs-full_DeferredTaxAssets_73cfbcb7-b528-4a99-9eeb-17237de02c5c_terseLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred income taxes</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxAssets_22e0919d-ec50-47d7-86d4-e0dfa981de67_verboseLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax assets</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxAssets_ad126e89-15b7-4bd1-80c5-489aa7f3dc0d_periodStartLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax assets, beginning balance</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxAssets_7d9b5d1b-38af-499e-8cb1-95c13772c711_periodEndLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax assets, ending balance</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxAssets_label_en-US" xlink:label="lab_ifrs-full_DeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax assets</link:label>
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    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_4421189e-3bd6-418e-8c71-fb74227f1010_verboseLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_b8f5bdb5-c849-4e4d-b4c9-c8aea34fb265_periodStartLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment, beginning balance</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_b026046b-39f8-48e8-bfba-9155ec47040a_periodEndLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment, ending balance</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_label_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_PropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PropertyPlantAndEquipment" xlink:to="lab_ifrs-full_PropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_IncrementalTermLoanMember_ec03ae8f-b432-4350-a2c7-37f06846381a_verboseLabel_en-US" xlink:label="lab_cls_IncrementalTermLoanMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Incremental Term Loan</link:label>
    <link:label id="lab_cls_IncrementalTermLoanMember_f70d70a8-13e3-4d9b-9e8c-fdc0cd3d7ff6_terseLabel_en-US" xlink:label="lab_cls_IncrementalTermLoanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">First Incremental Term Loan</link:label>
    <link:label id="lab_cls_IncrementalTermLoanMember_label_en-US" xlink:label="lab_cls_IncrementalTermLoanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Incremental Term Loan [Member]</link:label>
    <link:label id="lab_cls_IncrementalTermLoanMember_documentation_en-US" xlink:label="lab_cls_IncrementalTermLoanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Incremental Term Loan [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_IncrementalTermLoanMember" xlink:href="cls-20211231.xsd#cls_IncrementalTermLoanMember"/>
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    <link:label id="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets_141e7097-6dd2-4267-91f1-20f14241de15_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of computer software and property, plant and equipment</link:label>
    <link:label id="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets_label_en-US" xlink:label="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of property, plant and equipment, intangible assets other than goodwill, investment property and other non-current assets</link:label>
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    <link:label id="lab_cls_LeasePeriodTwo512033To4302043Member_f9821ab8-3f59-4c41-aa24-41737877f4c3_terseLabel_en-US" xlink:label="lab_cls_LeasePeriodTwo512033To4302043Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5/1/2033 to 4/30/2043</link:label>
    <link:label id="lab_cls_LeasePeriodTwo512033To4302043Member_label_en-US" xlink:label="lab_cls_LeasePeriodTwo512033To4302043Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Period Two - 5/1/2033 to 4/30/2043 [Member]</link:label>
    <link:label id="lab_cls_LeasePeriodTwo512033To4302043Member_documentation_en-US" xlink:label="lab_cls_LeasePeriodTwo512033To4302043Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Period Two - 5/1/2033 to 4/30/2043</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_LeasePeriodTwo512033To4302043Member" xlink:href="cls-20211231.xsd#cls_LeasePeriodTwo512033To4302043Member"/>
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    <link:label id="lab_ifrs-full_InventoryRecognisedAsOfAcquisitionDate_c9d925c6-5be5-4307-91cc-0ecced86c7dd_terseLabel_en-US" xlink:label="lab_ifrs-full_InventoryRecognisedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventories</link:label>
    <link:label id="lab_ifrs-full_InventoryRecognisedAsOfAcquisitionDate_label_en-US" xlink:label="lab_ifrs-full_InventoryRecognisedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventory recognised as of acquisition date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InventoryRecognisedAsOfAcquisitionDate" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_InventoryRecognisedAsOfAcquisitionDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InventoryRecognisedAsOfAcquisitionDate" xlink:to="lab_ifrs-full_InventoryRecognisedAsOfAcquisitionDate" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk_1bb90e10-c515-42c4-9012-cbb5f2c5ca87_terseLabel_en-US" xlink:label="lab_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Foreign Currency Risk Analysis</link:label>
    <link:label id="lab_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk_label_en-US" xlink:label="lab_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity analysis for types of market risk [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk" xlink:to="lab_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable_9d624fc9-14d0-4bbd-a3da-36ab12c42583_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts receivable</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for decrease (increase) in trade accounts receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable"/>
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    <link:label id="lab_cls_BorrowingFacilitiesAccordionFeatureHigherBorrowingCapacityOption_32b56ad6-da04-40b7-a310-6cdbc70efc16_terseLabel_en-US" xlink:label="lab_cls_BorrowingFacilitiesAccordionFeatureHigherBorrowingCapacityOption" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit facility accordion feature</link:label>
    <link:label id="lab_cls_BorrowingFacilitiesAccordionFeatureHigherBorrowingCapacityOption_label_en-US" xlink:label="lab_cls_BorrowingFacilitiesAccordionFeatureHigherBorrowingCapacityOption" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowing Facilities, Accordion Feature, Higher Borrowing Capacity Option</link:label>
    <link:label id="lab_cls_BorrowingFacilitiesAccordionFeatureHigherBorrowingCapacityOption_documentation_en-US" xlink:label="lab_cls_BorrowingFacilitiesAccordionFeatureHigherBorrowingCapacityOption" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowing Facilities, Accordion Feature, Higher Borrowing Capacity Option</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_BorrowingFacilitiesAccordionFeatureHigherBorrowingCapacityOption" xlink:href="cls-20211231.xsd#cls_BorrowingFacilitiesAccordionFeatureHigherBorrowingCapacityOption"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_BorrowingFacilitiesAccordionFeatureHigherBorrowingCapacityOption" xlink:to="lab_cls_BorrowingFacilitiesAccordionFeatureHigherBorrowingCapacityOption" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustedWeightedAverageShares_be123830-9fb5-4f54-9506-f28d5ff75999_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustedWeightedAverageShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Diluted (in shares)</link:label>
    <link:label id="lab_ifrs-full_AdjustedWeightedAverageShares_17a178c4-6113-4bc6-82b0-f9f2773ea719_totalLabel_en-US" xlink:label="lab_ifrs-full_AdjustedWeightedAverageShares" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average number of shares (diluted) (in shares)</link:label>
    <link:label id="lab_ifrs-full_AdjustedWeightedAverageShares_label_en-US" xlink:label="lab_ifrs-full_AdjustedWeightedAverageShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average number of ordinary shares used in calculating diluted earnings per share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustedWeightedAverageShares" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustedWeightedAverageShares"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustedWeightedAverageShares" xlink:to="lab_ifrs-full_AdjustedWeightedAverageShares" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_RevolvingCreditFacilityDueDec2026Member_8b6382e1-607a-489a-90e8-19e15cb6b214_terseLabel_en-US" xlink:label="lab_cls_RevolvingCreditFacilityDueDec2026Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolving Credit Facility Due Dec 2026</link:label>
    <link:label id="lab_cls_RevolvingCreditFacilityDueDec2026Member_label_en-US" xlink:label="lab_cls_RevolvingCreditFacilityDueDec2026Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolving Credit Facility Due Dec 2026 [Member]</link:label>
    <link:label id="lab_cls_RevolvingCreditFacilityDueDec2026Member_documentation_en-US" xlink:label="lab_cls_RevolvingCreditFacilityDueDec2026Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolving Credit Facility Due Dec 2026</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_RevolvingCreditFacilityDueDec2026Member" xlink:href="cls-20211231.xsd#cls_RevolvingCreditFacilityDueDec2026Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_RevolvingCreditFacilityDueDec2026Member" xlink:to="lab_cls_RevolvingCreditFacilityDueDec2026Member" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_AdditionalIncrementalSwapsMember_39395cea-defd-4a9b-980d-7621ac2f0f1f_terseLabel_en-US" xlink:label="lab_cls_AdditionalIncrementalSwapsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional Incremental Swaps</link:label>
    <link:label id="lab_cls_AdditionalIncrementalSwapsMember_label_en-US" xlink:label="lab_cls_AdditionalIncrementalSwapsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional Incremental Swaps [Member]</link:label>
    <link:label id="lab_cls_AdditionalIncrementalSwapsMember_documentation_en-US" xlink:label="lab_cls_AdditionalIncrementalSwapsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional Incremental Swaps</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_AdditionalIncrementalSwapsMember" xlink:href="cls-20211231.xsd#cls_AdditionalIncrementalSwapsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_AdditionalIncrementalSwapsMember" xlink:to="lab_cls_AdditionalIncrementalSwapsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_OtherChargesRecoveriesByFunction_ff292010-c8c9-4b20-96d6-4176e97b271a_terseLabel_en-US" xlink:label="lab_cls_OtherChargesRecoveriesByFunction" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other charges (recoveries)</link:label>
    <link:label id="lab_cls_OtherChargesRecoveriesByFunction_label_en-US" xlink:label="lab_cls_OtherChargesRecoveriesByFunction" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Charges (Recoveries), By Function</link:label>
    <link:label id="lab_cls_OtherChargesRecoveriesByFunction_documentation_en-US" xlink:label="lab_cls_OtherChargesRecoveriesByFunction" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Charges (Recoveries), By Function</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_OtherChargesRecoveriesByFunction" xlink:href="cls-20211231.xsd#cls_OtherChargesRecoveriesByFunction"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_OtherChargesRecoveriesByFunction" xlink:to="lab_cls_OtherChargesRecoveriesByFunction" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SegmentConsolidationItemsAxis_7c5f1702-e180-4ba8-ac09-be5b4ea6a358_terseLabel_en-US" xlink:label="lab_ifrs-full_SegmentConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment consolidation items [axis]</link:label>
    <link:label id="lab_ifrs-full_SegmentConsolidationItemsAxis_label_en-US" xlink:label="lab_ifrs-full_SegmentConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment consolidation items [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_SegmentConsolidationItemsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SegmentConsolidationItemsAxis" xlink:to="lab_ifrs-full_SegmentConsolidationItemsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_BuildingBuildingImprovementsandLeaseholdImprovementsMember_9680d21e-98ba-4133-8142-4bd6f0f67f9e_terseLabel_en-US" xlink:label="lab_cls_BuildingBuildingImprovementsandLeaseholdImprovementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Buildings including improvements</link:label>
    <link:label id="lab_cls_BuildingBuildingImprovementsandLeaseholdImprovementsMember_label_en-US" xlink:label="lab_cls_BuildingBuildingImprovementsandLeaseholdImprovementsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Building, Building Improvements and Leasehold Improvements [Member]</link:label>
    <link:label id="lab_cls_BuildingBuildingImprovementsandLeaseholdImprovementsMember_documentation_en-US" xlink:label="lab_cls_BuildingBuildingImprovementsandLeaseholdImprovementsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Building, Building Improvements and Leasehold Improvements [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_BuildingBuildingImprovementsandLeaseholdImprovementsMember" xlink:href="cls-20211231.xsd#cls_BuildingBuildingImprovementsandLeaseholdImprovementsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_BuildingBuildingImprovementsandLeaseholdImprovementsMember" xlink:to="lab_cls_BuildingBuildingImprovementsandLeaseholdImprovementsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities_14ac7095-09ad-4924-91ab-1d8ff85914d3_totalLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net cash provided by (used in) financing activities</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from (used in) financing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_LeasesAnnualRentExpense_229b69a0-be86-4ef6-83fd-e633717a56d3_terseLabel_en-US" xlink:label="lab_cls_LeasesAnnualRentExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Annual base rent expense</link:label>
    <link:label id="lab_cls_LeasesAnnualRentExpense_label_en-US" xlink:label="lab_cls_LeasesAnnualRentExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases, Annual Rent Expense</link:label>
    <link:label id="lab_cls_LeasesAnnualRentExpense_documentation_en-US" xlink:label="lab_cls_LeasesAnnualRentExpense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases, Annual Rent Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_LeasesAnnualRentExpense" xlink:href="cls-20211231.xsd#cls_LeasesAnnualRentExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_LeasesAnnualRentExpense" xlink:to="lab_cls_LeasesAnnualRentExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_TransferOfFInancialAssetsAccountedForAsSalesNumberOfBanks_db8c2019-9022-445f-bb10-23e8bf1d7d40_terseLabel_en-US" xlink:label="lab_cls_TransferOfFInancialAssetsAccountedForAsSalesNumberOfBanks" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">A/R sales program, number of third-party banks</link:label>
    <link:label id="lab_cls_TransferOfFInancialAssetsAccountedForAsSalesNumberOfBanks_label_en-US" xlink:label="lab_cls_TransferOfFInancialAssetsAccountedForAsSalesNumberOfBanks" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfer Of FInancial Assets Accounted For As Sales, Number Of Banks</link:label>
    <link:label id="lab_cls_TransferOfFInancialAssetsAccountedForAsSalesNumberOfBanks_documentation_en-US" xlink:label="lab_cls_TransferOfFInancialAssetsAccountedForAsSalesNumberOfBanks" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfer Of FInancial Assets Accounted For As Sales, Number Of Banks</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_TransferOfFInancialAssetsAccountedForAsSalesNumberOfBanks" xlink:href="cls-20211231.xsd#cls_TransferOfFInancialAssetsAccountedForAsSalesNumberOfBanks"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_TransferOfFInancialAssetsAccountedForAsSalesNumberOfBanks" xlink:to="lab_cls_TransferOfFInancialAssetsAccountedForAsSalesNumberOfBanks" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_AccountsReceivableAndOtherCurrentAssetsRecognisedAsOfAcquisitionDate_7f1a81b5-0352-41a7-94cf-b3920094d3d7_terseLabel_en-US" xlink:label="lab_cls_AccountsReceivableAndOtherCurrentAssetsRecognisedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts receivable and other current assets</link:label>
    <link:label id="lab_cls_AccountsReceivableAndOtherCurrentAssetsRecognisedAsOfAcquisitionDate_label_en-US" xlink:label="lab_cls_AccountsReceivableAndOtherCurrentAssetsRecognisedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts Receivable And Other Current Assets Recognised As Of Acquisition Date</link:label>
    <link:label id="lab_cls_AccountsReceivableAndOtherCurrentAssetsRecognisedAsOfAcquisitionDate_documentation_en-US" xlink:label="lab_cls_AccountsReceivableAndOtherCurrentAssetsRecognisedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts Receivable And Other Current Assets Recognised As Of Acquisition Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_AccountsReceivableAndOtherCurrentAssetsRecognisedAsOfAcquisitionDate" xlink:href="cls-20211231.xsd#cls_AccountsReceivableAndOtherCurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_AccountsReceivableAndOtherCurrentAssetsRecognisedAsOfAcquisitionDate" xlink:to="lab_cls_AccountsReceivableAndOtherCurrentAssetsRecognisedAsOfAcquisitionDate" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_KeyManagementPersonnelCompensationPostemploymentAndOtherLongtermEmployeeBenefits_7e24ee7b-a7dd-4183-a881-6b063ac52890_terseLabel_en-US" xlink:label="lab_cls_KeyManagementPersonnelCompensationPostemploymentAndOtherLongtermEmployeeBenefits" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Post-employment and other long-term benefits</link:label>
    <link:label id="lab_cls_KeyManagementPersonnelCompensationPostemploymentAndOtherLongtermEmployeeBenefits_label_en-US" xlink:label="lab_cls_KeyManagementPersonnelCompensationPostemploymentAndOtherLongtermEmployeeBenefits" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Key Management Personnel Compensation, Post-employment And Other Long-term Employee Benefits</link:label>
    <link:label id="lab_cls_KeyManagementPersonnelCompensationPostemploymentAndOtherLongtermEmployeeBenefits_documentation_en-US" xlink:label="lab_cls_KeyManagementPersonnelCompensationPostemploymentAndOtherLongtermEmployeeBenefits" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Key Management Personnel Compensation, Post-employment And Other Long-term Employee Benefits</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_KeyManagementPersonnelCompensationPostemploymentAndOtherLongtermEmployeeBenefits" xlink:href="cls-20211231.xsd#cls_KeyManagementPersonnelCompensationPostemploymentAndOtherLongtermEmployeeBenefits"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_KeyManagementPersonnelCompensationPostemploymentAndOtherLongtermEmployeeBenefits" xlink:to="lab_cls_KeyManagementPersonnelCompensationPostemploymentAndOtherLongtermEmployeeBenefits" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusMember_46389b4f-8b4b-4eb5-8cb9-96f9a572de3e_terseLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment by operating lease status</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusMember_label_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment by operating lease status [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusMember" xlink:to="lab_ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_StockRepurchaseProgramNumberOfSharesRemaining_e939d86b-cd63-4313-a1fa-649d78550dde_terseLabel_en-US" xlink:label="lab_cls_StockRepurchaseProgramNumberOfSharesRemaining" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock repurchase program, number of shares remaining</link:label>
    <link:label id="lab_cls_StockRepurchaseProgramNumberOfSharesRemaining_label_en-US" xlink:label="lab_cls_StockRepurchaseProgramNumberOfSharesRemaining" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Repurchase Program, Number Of Shares Remaining</link:label>
    <link:label id="lab_cls_StockRepurchaseProgramNumberOfSharesRemaining_documentation_en-US" xlink:label="lab_cls_StockRepurchaseProgramNumberOfSharesRemaining" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Repurchase Program, Number Of Shares Remaining</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_StockRepurchaseProgramNumberOfSharesRemaining" xlink:href="cls-20211231.xsd#cls_StockRepurchaseProgramNumberOfSharesRemaining"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_StockRepurchaseProgramNumberOfSharesRemaining" xlink:to="lab_cls_StockRepurchaseProgramNumberOfSharesRemaining" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_ShareRepurchaseProgram1Axis_f3ba1cb8-9b07-482b-ace8-240c4f727735_terseLabel_en-US" xlink:label="lab_cls_ShareRepurchaseProgram1Axis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share Repurchase Program [Axis]</link:label>
    <link:label id="lab_cls_ShareRepurchaseProgram1Axis_label_en-US" xlink:label="lab_cls_ShareRepurchaseProgram1Axis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share Repurchase Program1 [Axis]</link:label>
    <link:label id="lab_cls_ShareRepurchaseProgram1Axis_documentation_en-US" xlink:label="lab_cls_ShareRepurchaseProgram1Axis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share Repurchase Program1 [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_ShareRepurchaseProgram1Axis" xlink:href="cls-20211231.xsd#cls_ShareRepurchaseProgram1Axis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_ShareRepurchaseProgram1Axis" xlink:to="lab_cls_ShareRepurchaseProgram1Axis" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_IncomeTaxExpenseBenefitRTPAdjustmentsRelatedToPriorYears_e733c421-8f13-4402-b364-838aceb443b4_terseLabel_en-US" xlink:label="lab_cls_IncomeTaxExpenseBenefitRTPAdjustmentsRelatedToPriorYears" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">RTP adjustments</link:label>
    <link:label id="lab_cls_IncomeTaxExpenseBenefitRTPAdjustmentsRelatedToPriorYears_label_en-US" xlink:label="lab_cls_IncomeTaxExpenseBenefitRTPAdjustmentsRelatedToPriorYears" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Expense (Benefit), RTP Adjustments Related To Prior Years</link:label>
    <link:label id="lab_cls_IncomeTaxExpenseBenefitRTPAdjustmentsRelatedToPriorYears_documentation_en-US" xlink:label="lab_cls_IncomeTaxExpenseBenefitRTPAdjustmentsRelatedToPriorYears" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Expense (Benefit), RTP Adjustments Related To Prior Years</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_IncomeTaxExpenseBenefitRTPAdjustmentsRelatedToPriorYears" xlink:href="cls-20211231.xsd#cls_IncomeTaxExpenseBenefitRTPAdjustmentsRelatedToPriorYears"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_IncomeTaxExpenseBenefitRTPAdjustmentsRelatedToPriorYears" xlink:to="lab_cls_IncomeTaxExpenseBenefitRTPAdjustmentsRelatedToPriorYears" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_CCSSegmentCustomerMember_150697b3-186a-4926-a0eb-960374b2c3a6_terseLabel_en-US" xlink:label="lab_cls_CCSSegmentCustomerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CCS Segment Customer</link:label>
    <link:label id="lab_cls_CCSSegmentCustomerMember_label_en-US" xlink:label="lab_cls_CCSSegmentCustomerMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CCS Segment Customer [Member]</link:label>
    <link:label id="lab_cls_CCSSegmentCustomerMember_documentation_en-US" xlink:label="lab_cls_CCSSegmentCustomerMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CCS Segment Customer [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_CCSSegmentCustomerMember" xlink:href="cls-20211231.xsd#cls_CCSSegmentCustomerMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_CCSSegmentCustomerMember" xlink:to="lab_cls_CCSSegmentCustomerMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressCityOrTown_ffd5af62-73e5-45ca-b7bb-f67884513efb_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:label id="lab_dei_EntityAddressCityOrTown_label_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressCityOrTown"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressCityOrTown" xlink:to="lab_dei_EntityAddressCityOrTown" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherProvisionsMember_3b80ff63-1e7a-4add-af50-bc758bab1118_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherProvisionsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other provisions</link:label>
    <link:label id="lab_ifrs-full_OtherProvisionsMember_label_en-US" xlink:label="lab_ifrs-full_OtherProvisionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other provisions [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherProvisionsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherProvisionsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherProvisionsMember" xlink:to="lab_ifrs-full_OtherProvisionsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AllLevelsOfFairValueHierarchyMember_ab2d4ae3-df79-4800-a153-1d88c5d5acf2_terseLabel_en-US" xlink:label="lab_ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">All levels of fair value hierarchy</link:label>
    <link:label id="lab_ifrs-full_AllLevelsOfFairValueHierarchyMember_label_en-US" xlink:label="lab_ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">All levels of fair value hierarchy [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AllLevelsOfFairValueHierarchyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:to="lab_ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations_527fa311-c5f2-4e92-9fb1-3864d4ffc63a_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from Toronto sale</link:label>
    <link:label id="lab_ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations_label_en-US" xlink:label="lab_ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from disposal of non-current assets or disposal groups classified as held for sale and discontinued operations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:to="lab_ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities_bc7052f0-1422-488a-9153-d371bc4fbbb3_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued and other current liabilities</link:label>
    <link:label id="lab_ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities_label_en-US" xlink:label="lab_ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current accrued expenses and other current liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities" xlink:to="lab_ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ContingentLiabilityForGuaranteesMember_41cf6dbf-4aa4-471b-8029-858f7a8a7b9f_terseLabel_en-US" xlink:label="lab_ifrs-full_ContingentLiabilityForGuaranteesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Guarantees</link:label>
    <link:label id="lab_ifrs-full_ContingentLiabilityForGuaranteesMember_label_en-US" xlink:label="lab_ifrs-full_ContingentLiabilityForGuaranteesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contingent liability for guarantees [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContingentLiabilityForGuaranteesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ContingentLiabilityForGuaranteesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ContingentLiabilityForGuaranteesMember" xlink:to="lab_ifrs-full_ContingentLiabilityForGuaranteesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_UKMainPensionPlanMember_3fba5980-104a-4891-b32a-bf4a2ea683a3_terseLabel_en-US" xlink:label="lab_cls_UKMainPensionPlanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">UK Main Pension Plan</link:label>
    <link:label id="lab_cls_UKMainPensionPlanMember_label_en-US" xlink:label="lab_cls_UKMainPensionPlanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">UK Main Pension Plan [Member]</link:label>
    <link:label id="lab_cls_UKMainPensionPlanMember_documentation_en-US" xlink:label="lab_cls_UKMainPensionPlanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">UK Main Pension Plan [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_UKMainPensionPlanMember" xlink:href="cls-20211231.xsd#cls_UKMainPensionPlanMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_UKMainPensionPlanMember" xlink:to="lab_cls_UKMainPensionPlanMember" xlink:type="arc" order="1"/>
    <link:label id="lab_currency_THB_b8a20892-30f5-4d07-b3e2-13ca486773fb_terseLabel_en-US" xlink:label="lab_currency_THB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Thai baht</link:label>
    <link:label id="lab_currency_THB_label_en-US" xlink:label="lab_currency_THB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Thailand, Baht</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_currency_THB" xlink:href="https://xbrl.sec.gov/currency/2021/currency-2021.xsd#currency_THB"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_currency_THB" xlink:to="lab_currency_THB" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_SharebasedCompensationAwardTrancheTwo1Member_69c6055f-f406-4466-a076-96f2d0ae1ddb_terseLabel_en-US" xlink:label="lab_cls_SharebasedCompensationAwardTrancheTwo1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">25% vested in year 2</link:label>
    <link:label id="lab_cls_SharebasedCompensationAwardTrancheTwo1Member_label_en-US" xlink:label="lab_cls_SharebasedCompensationAwardTrancheTwo1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Award, Tranche Two1 [Member]</link:label>
    <link:label id="lab_cls_SharebasedCompensationAwardTrancheTwo1Member_documentation_en-US" xlink:label="lab_cls_SharebasedCompensationAwardTrancheTwo1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Award, Tranche Two1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_SharebasedCompensationAwardTrancheTwo1Member" xlink:href="cls-20211231.xsd#cls_SharebasedCompensationAwardTrancheTwo1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_SharebasedCompensationAwardTrancheTwo1Member" xlink:to="lab_cls_SharebasedCompensationAwardTrancheTwo1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForIncomeTaxExpense_3475e172-b8f3-4dc4-aab9-b836f0d5902f_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax expense</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForIncomeTaxExpense_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for income tax expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForIncomeTaxExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:to="lab_ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IssuedCapitalMember_02c137ed-843d-46ba-b1d1-5818ba9d8936_terseLabel_en-US" xlink:label="lab_ifrs-full_IssuedCapitalMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital stock (note 13)</link:label>
    <link:label id="lab_ifrs-full_IssuedCapitalMember_label_en-US" xlink:label="lab_ifrs-full_IssuedCapitalMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued capital [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapitalMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IssuedCapitalMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IssuedCapitalMember" xlink:to="lab_ifrs-full_IssuedCapitalMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentTaxAssetsCurrent_5d8562a4-b964-4659-ae60-482325775f54_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentTaxAssetsCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes receivable</link:label>
    <link:label id="lab_ifrs-full_CurrentTaxAssetsCurrent_label_en-US" xlink:label="lab_ifrs-full_CurrentTaxAssetsCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current tax assets, current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentTaxAssetsCurrent" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CurrentTaxAssetsCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentTaxAssetsCurrent" xlink:to="lab_ifrs-full_CurrentTaxAssetsCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_4e1e48b2-5d14-40a5-ac9e-4d827a273076_terseLabel_en-US" xlink:label="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Temporary difference, unused tax losses and unused tax credits</link:label>
    <link:label id="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_label_en-US" xlink:label="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Temporary difference, unused tax losses and unused tax credits [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_DisclosureOfDetailedInformationAboutNoncurrentAssetsExplanatoryTableTextBlock_e689a4f3-f274-4c1b-946b-38260dcda847_terseLabel_en-US" xlink:label="lab_cls_DisclosureOfDetailedInformationAboutNoncurrentAssetsExplanatoryTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Detailed Information About Non-current Assets</link:label>
    <link:label id="lab_cls_DisclosureOfDetailedInformationAboutNoncurrentAssetsExplanatoryTableTextBlock_label_en-US" xlink:label="lab_cls_DisclosureOfDetailedInformationAboutNoncurrentAssetsExplanatoryTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Detailed Information About Non-current Assets Explanatory [Table Text Block]</link:label>
    <link:label id="lab_cls_DisclosureOfDetailedInformationAboutNoncurrentAssetsExplanatoryTableTextBlock_documentation_en-US" xlink:label="lab_cls_DisclosureOfDetailedInformationAboutNoncurrentAssetsExplanatoryTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Detailed Information About Non-current Assets Explanatory [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_DisclosureOfDetailedInformationAboutNoncurrentAssetsExplanatoryTableTextBlock" xlink:href="cls-20211231.xsd#cls_DisclosureOfDetailedInformationAboutNoncurrentAssetsExplanatoryTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_DisclosureOfDetailedInformationAboutNoncurrentAssetsExplanatoryTableTextBlock" xlink:to="lab_cls_DisclosureOfDetailedInformationAboutNoncurrentAssetsExplanatoryTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_TwoThousandTwentyNCIBMember_9b5fd72f-c156-46b6-a143-0573770821f9_terseLabel_en-US" xlink:label="lab_cls_TwoThousandTwentyNCIBMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2020 NCIB</link:label>
    <link:label id="lab_cls_TwoThousandTwentyNCIBMember_label_en-US" xlink:label="lab_cls_TwoThousandTwentyNCIBMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Two Thousand Twenty NCIB [Member]</link:label>
    <link:label id="lab_cls_TwoThousandTwentyNCIBMember_documentation_en-US" xlink:label="lab_cls_TwoThousandTwentyNCIBMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Two Thousand Twenty NCIB</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_TwoThousandTwentyNCIBMember" xlink:href="cls-20211231.xsd#cls_TwoThousandTwentyNCIBMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_TwoThousandTwentyNCIBMember" xlink:to="lab_cls_TwoThousandTwentyNCIBMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityFilerCategory_c96c2738-96ff-4043-ad15-8fd88aed7dee_terseLabel_en-US" xlink:label="lab_dei_EntityFilerCategory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Filer Category</link:label>
    <link:label id="lab_dei_EntityFilerCategory_label_en-US" xlink:label="lab_dei_EntityFilerCategory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Filer Category</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityFilerCategory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFilerCategory" xlink:to="lab_dei_EntityFilerCategory" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_LeasesNotYetCommencedAnnualRentExpense_c2017640-f189-4798-9cde-d917093f11d8_terseLabel_en-US" xlink:label="lab_cls_LeasesNotYetCommencedAnnualRentExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total future minimum lease payments</link:label>
    <link:label id="lab_cls_LeasesNotYetCommencedAnnualRentExpense_label_en-US" xlink:label="lab_cls_LeasesNotYetCommencedAnnualRentExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases, Not Yet Commenced, Annual Rent Expense</link:label>
    <link:label id="lab_cls_LeasesNotYetCommencedAnnualRentExpense_documentation_en-US" xlink:label="lab_cls_LeasesNotYetCommencedAnnualRentExpense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases, Not Yet Commenced, Annual Rent Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_LeasesNotYetCommencedAnnualRentExpense" xlink:href="cls-20211231.xsd#cls_LeasesNotYetCommencedAnnualRentExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_LeasesNotYetCommencedAnnualRentExpense" xlink:to="lab_cls_LeasesNotYetCommencedAnnualRentExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_ATSSegmentCustomerMember_0cca6d8a-96b1-45b7-8f55-e7323ccc86b9_terseLabel_en-US" xlink:label="lab_cls_ATSSegmentCustomerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ATS Segment Customer</link:label>
    <link:label id="lab_cls_ATSSegmentCustomerMember_label_en-US" xlink:label="lab_cls_ATSSegmentCustomerMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ATS Segment Customer [Member]</link:label>
    <link:label id="lab_cls_ATSSegmentCustomerMember_documentation_en-US" xlink:label="lab_cls_ATSSegmentCustomerMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ATS Segment Customer [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_ATSSegmentCustomerMember" xlink:href="cls-20211231.xsd#cls_ATSSegmentCustomerMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_ATSSegmentCustomerMember" xlink:to="lab_cls_ATSSegmentCustomerMember" xlink:type="arc" order="1"/>
    <link:label id="lab_currency_MYR_cc0bf0aa-9fb6-4242-8501-165d5fc1b64c_terseLabel_en-US" xlink:label="lab_currency_MYR" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Malaysian ringgit</link:label>
    <link:label id="lab_currency_MYR_label_en-US" xlink:label="lab_currency_MYR" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Malaysia, Ringgits</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_currency_MYR" xlink:href="https://xbrl.sec.gov/currency/2021/currency-2021.xsd#currency_MYR"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_currency_MYR" xlink:to="lab_currency_MYR" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_DeferredFinanceCosts_dea64ee9-9df8-4c48-9c71-7530709e4271_terseLabel_en-US" xlink:label="lab_cls_DeferredFinanceCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred financing costs</link:label>
    <link:label id="lab_cls_DeferredFinanceCosts_label_en-US" xlink:label="lab_cls_DeferredFinanceCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Finance Costs</link:label>
    <link:label id="lab_cls_DeferredFinanceCosts_documentation_en-US" xlink:label="lab_cls_DeferredFinanceCosts" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Finance Costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_DeferredFinanceCosts" xlink:href="cls-20211231.xsd#cls_DeferredFinanceCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_DeferredFinanceCosts" xlink:to="lab_cls_DeferredFinanceCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_BusinessCombinationsAxis_56fc8d67-d1f0-4038-9536-a0cc85918e72_terseLabel_en-US" xlink:label="lab_ifrs-full_BusinessCombinationsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business combinations [axis]</link:label>
    <link:label id="lab_ifrs-full_BusinessCombinationsAxis_label_en-US" xlink:label="lab_ifrs-full_BusinessCombinationsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business combinations [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BusinessCombinationsAxis" xlink:to="lab_ifrs-full_BusinessCombinationsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_StockIssuedDuringPeriodValueTreasuryStockReissuedSharebasedCompensation_cc2560d9-3d9e-42ae-a16f-9d106c186082_terseLabel_en-US" xlink:label="lab_cls_StockIssuedDuringPeriodValueTreasuryStockReissuedSharebasedCompensation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value of shares issued upon vesting of RSUs</link:label>
    <link:label id="lab_cls_StockIssuedDuringPeriodValueTreasuryStockReissuedSharebasedCompensation_label_en-US" xlink:label="lab_cls_StockIssuedDuringPeriodValueTreasuryStockReissuedSharebasedCompensation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Issued During Period, Value, Treasury Stock Reissued, Share-based Compensation</link:label>
    <link:label id="lab_cls_StockIssuedDuringPeriodValueTreasuryStockReissuedSharebasedCompensation_documentation_en-US" xlink:label="lab_cls_StockIssuedDuringPeriodValueTreasuryStockReissuedSharebasedCompensation" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Issued During Period, Value, Treasury Stock Reissued, Share-based Compensation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_StockIssuedDuringPeriodValueTreasuryStockReissuedSharebasedCompensation" xlink:href="cls-20211231.xsd#cls_StockIssuedDuringPeriodValueTreasuryStockReissuedSharebasedCompensation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_StockIssuedDuringPeriodValueTreasuryStockReissuedSharebasedCompensation" xlink:to="lab_cls_StockIssuedDuringPeriodValueTreasuryStockReissuedSharebasedCompensation" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_EmployeeStockOption1Member_b7a1e901-4d88-41f1-9b53-0d7d45df9486_terseLabel_en-US" xlink:label="lab_cls_EmployeeStockOption1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Options</link:label>
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    <link:label id="lab_ifrs-full_SharebasedPaymentArrangementsMember_173a20bd-3a06-4773-8448-cfb18c7db3b4_terseLabel_en-US" xlink:label="lab_ifrs-full_SharebasedPaymentArrangementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payment arrangements</link:label>
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    <link:label id="lab_dei_AmendmentFlag_1962c263-3afa-4502-9178-2c5de0c6c5b9_terseLabel_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amendment Flag</link:label>
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    <link:label id="lab_ifrs-full_TransportationExpense_c658ea64-11f1-4174-bcb4-265936598eb8_terseLabel_en-US" xlink:label="lab_ifrs-full_TransportationExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Freight and transportation costs</link:label>
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    <link:label id="lab_cls_Mr.WilliamA.EtheringtonMember_06f18e5a-2447-4dd9-a11b-464093a233f1_terseLabel_en-US" xlink:label="lab_cls_Mr.WilliamA.EtheringtonMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mr. William A. Etherington</link:label>
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    <link:label id="lab_cls_Mr.WilliamA.EtheringtonMember_documentation_en-US" xlink:label="lab_cls_Mr.WilliamA.EtheringtonMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mr. William A. Etherington [Member]</link:label>
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    <link:label id="lab_ifrs-full_ExplanationOfMeasurementBasesUsedInPreparingFinancialStatements_4f8a3664-bc79-4ac1-bc35-e1f50f9dbbb9_terseLabel_en-US" xlink:label="lab_ifrs-full_ExplanationOfMeasurementBasesUsedInPreparingFinancialStatements" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Basis of measurement</link:label>
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    <link:label id="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfAnnualFeesPaidToBoardOfDirectorsCash_83057ab2-557c-4ccd-a510-b250d4e50170_terseLabel_en-US" xlink:label="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfAnnualFeesPaidToBoardOfDirectorsCash" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of annual fees paid to board of directors in cash (percent)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfAnnualFeesPaidToBoardOfDirectorsCash" xlink:href="cls-20211231.xsd#cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfAnnualFeesPaidToBoardOfDirectorsCash"/>
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    <link:label id="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_ffb920c8-dc82-4d77-a77c-34ed2a781ce5_terseLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average exercise price, granted (in dollars per share)</link:label>
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    <link:label id="lab_ifrs-full_DepreciationRightofuseAssets_77afb0a5-c89f-4684-b201-f8fc7386e066_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_DepreciationRightofuseAssets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation</link:label>
    <link:label id="lab_ifrs-full_DepreciationRightofuseAssets_label_en-US" xlink:label="lab_ifrs-full_DepreciationRightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation, right-of-use assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationRightofuseAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DepreciationRightofuseAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DepreciationRightofuseAssets" xlink:to="lab_ifrs-full_DepreciationRightofuseAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory_3390091b-31e4-4c20-ba84-c0620b13e61f_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments and Risk Management</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial instruments [text block]</link:label>
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    <link:label id="lab_cls_RetirementOfTheChairmanOfTheBoardOfDirectorsMember_52a5cb5f-0bab-4ae1-ac6b-f8707c17d229_terseLabel_en-US" xlink:label="lab_cls_RetirementOfTheChairmanOfTheBoardOfDirectorsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement of the chairman of the board of directors</link:label>
    <link:label id="lab_cls_RetirementOfTheChairmanOfTheBoardOfDirectorsMember_label_en-US" xlink:label="lab_cls_RetirementOfTheChairmanOfTheBoardOfDirectorsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement Of The Chairman Of The Board Of Directors [Member]</link:label>
    <link:label id="lab_cls_RetirementOfTheChairmanOfTheBoardOfDirectorsMember_documentation_en-US" xlink:label="lab_cls_RetirementOfTheChairmanOfTheBoardOfDirectorsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement Of The Chairman Of The Board Of Directors [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_RetirementOfTheChairmanOfTheBoardOfDirectorsMember" xlink:href="cls-20211231.xsd#cls_RetirementOfTheChairmanOfTheBoardOfDirectorsMember"/>
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    <link:label id="lab_cls_GainsOnSaleOfSurplusEquipmentMember_c856bcce-006b-4399-90cc-45f6b5b7dcb8_terseLabel_en-US" xlink:label="lab_cls_GainsOnSaleOfSurplusEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains on sale of surplus equipment</link:label>
    <link:label id="lab_cls_GainsOnSaleOfSurplusEquipmentMember_label_en-US" xlink:label="lab_cls_GainsOnSaleOfSurplusEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains on sale of surplus equipment [Member]</link:label>
    <link:label id="lab_cls_GainsOnSaleOfSurplusEquipmentMember_documentation_en-US" xlink:label="lab_cls_GainsOnSaleOfSurplusEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains on sale of surplus equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_GainsOnSaleOfSurplusEquipmentMember" xlink:href="cls-20211231.xsd#cls_GainsOnSaleOfSurplusEquipmentMember"/>
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    <link:label id="lab_cls_RevolvingLoansMember_b5fb4a9b-9c18-482b-b37b-e925dae90d81_terseLabel_en-US" xlink:label="lab_cls_RevolvingLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolving Loans</link:label>
    <link:label id="lab_cls_RevolvingLoansMember_label_en-US" xlink:label="lab_cls_RevolvingLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolving Loans [Member]</link:label>
    <link:label id="lab_cls_RevolvingLoansMember_documentation_en-US" xlink:label="lab_cls_RevolvingLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolving Loans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_RevolvingLoansMember" xlink:href="cls-20211231.xsd#cls_RevolvingLoansMember"/>
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    <link:label id="lab_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract_1110a72c-1840-4f61-a4fa-4a3bcfcf4167_terseLabel_en-US" xlink:label="lab_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Items that will not be reclassified to net earnings:</link:label>
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    <link:label id="lab_currency_MXN_376d818c-5ddc-4ec3-94ea-bc6a512cf1e0_terseLabel_en-US" xlink:label="lab_currency_MXN" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mexican peso</link:label>
    <link:label id="lab_currency_MXN_label_en-US" xlink:label="lab_currency_MXN" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mexico, Pesos</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_currency_MXN" xlink:href="https://xbrl.sec.gov/currency/2021/currency-2021.xsd#currency_MXN"/>
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    <link:label id="lab_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_fc750b76-c8d0-4135-951b-5dbb3a93aeec_terseLabel_en-US" xlink:label="lab_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-adjusting events after reporting period [axis]</link:label>
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    <link:label id="lab_ifrs-full_CurrentTaxExpenseIncome_c6f1d718-e3a8-4ec9-9455-bd7b1e7cadb2_verboseLabel_en-US" xlink:label="lab_ifrs-full_CurrentTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current year</link:label>
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    <link:label id="lab_cls_BorrowingsAndLeaseLiabilities_documentation_en-US" xlink:label="lab_cls_BorrowingsAndLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings and Lease Liabilities</link:label>
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    <link:label id="lab_cls_IncomeTaxRelatingToGainsLossesOnCashFlowHedgesOfOtherComprehensiveIncome_d75a3871-cd1b-473f-872d-f8d6fd22501d_terseLabel_en-US" xlink:label="lab_cls_IncomeTaxRelatingToGainsLossesOnCashFlowHedgesOfOtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax expense (recovery) relating to net loss on cash flow hedges</link:label>
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    <link:label id="lab_cls_DebtInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage_f7ee79d2-9c96-43cf-9ae4-8597b0939ad4_terseLabel_en-US" xlink:label="lab_cls_DebtInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt investment funds, allocation percentage</link:label>
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    <link:label id="lab_cls_ImpaktHoldingsLLCImpaktMember_ef06cef8-3992-4768-b760-31a47f3fb21b_terseLabel_en-US" xlink:label="lab_cls_ImpaktHoldingsLLCImpaktMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impakt</link:label>
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    <link:label id="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesAgreementTerm_0a28c1d2-a218-449f-96fd-69aa0b020810_terseLabel_en-US" xlink:label="lab_cls_TransferOfFinancialAssetsAccountedForAsSalesAgreementTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Agreement term</link:label>
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    <link:label id="lab_cls_InsuranceAnnuitiesAmountContributedToFairValueOfPlanAssets_180b0235-22d2-4b6b-aace-eb4cf7104b69_terseLabel_en-US" xlink:label="lab_cls_InsuranceAnnuitiesAmountContributedToFairValueOfPlanAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Insurance annuities</link:label>
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    <link:label id="lab_cls_InsuranceAnnuitiesAmountContributedToFairValueOfPlanAssets_documentation_en-US" xlink:label="lab_cls_InsuranceAnnuitiesAmountContributedToFairValueOfPlanAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Insurance Annuities, Amount Contributed To Fair Value Of Plan Assets</link:label>
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    <link:label id="lab_ifrs-full_NumberOfSharesIssued_c8134e6e-3945-4b5c-8929-d6a101838d0f_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfSharesIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares issued (in shares)</link:label>
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    <link:label id="lab_ifrs-full_PreferenceSharesMember_7bd6d0c1-3cf8-42b6-9518-b94dca23bac7_verboseLabel_en-US" xlink:label="lab_ifrs-full_PreferenceSharesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference Shares</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_fb7fdbd3-185a-40a1-b6a5-e3aebe9302dd_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of net defined benefit liability (asset) [table]</link:label>
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    <link:label id="lab_ifrs-full_FinishedGoods_9460a375-e25b-4849-94ab-3e2b5c38d14d_terseLabel_en-US" xlink:label="lab_ifrs-full_FinishedGoods" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finished goods</link:label>
    <link:label id="lab_ifrs-full_FinishedGoods_label_en-US" xlink:label="lab_ifrs-full_FinishedGoods" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current finished goods</link:label>
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    <link:label id="lab_cls_TwoThousandSeventeenNCIBMember_156c532b-8be4-43f0-bd91-44b9a6941812_terseLabel_en-US" xlink:label="lab_cls_TwoThousandSeventeenNCIBMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2017 NCIB</link:label>
    <link:label id="lab_cls_TwoThousandSeventeenNCIBMember_label_en-US" xlink:label="lab_cls_TwoThousandSeventeenNCIBMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Two Thousand Seventeen NCIB [Member]</link:label>
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    <link:label id="lab_cls_AccrualForRepurchaseOfStockUnderAutomaticSharePurchasePlan_1890f3e3-e746-4d6f-b929-22b282ac9966_terseLabel_en-US" xlink:label="lab_cls_AccrualForRepurchaseOfStockUnderAutomaticSharePurchasePlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrual for repurchase of stock under automatic share purchase plan</link:label>
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    <link:label id="lab_ifrs-full_ExpenseOfRestructuringActivities_9426cbcf-0b39-4e52-88fc-bed22b63d0b9_terseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseOfRestructuringActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring charges</link:label>
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    <link:label id="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionRateNumerator_88aab6fb-7516-4579-8702-b82f3a3cc18c_terseLabel_en-US" xlink:label="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionRateNumerator" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Conversion rate, numerator (in shares)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionRateNumerator" xlink:href="cls-20211231.xsd#cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionRateNumerator"/>
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    <link:label id="lab_ifrs-full_UnrealisedForeignExchangeGainsLossesMember_27d66596-d98f-44f4-b1c0-d86c2bc64409_terseLabel_en-US" xlink:label="lab_ifrs-full_UnrealisedForeignExchangeGainsLossesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrealized foreign exchange gains</link:label>
    <link:label id="lab_ifrs-full_UnrealisedForeignExchangeGainsLossesMember_label_en-US" xlink:label="lab_ifrs-full_UnrealisedForeignExchangeGainsLossesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrealised foreign exchange gains (losses) [member]</link:label>
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    <link:label id="lab_cls_AcquisitionsPriorToImpaktAcquisitionMember_6aeb9829-fcef-429c-b717-6649525f3165_terseLabel_en-US" xlink:label="lab_cls_AcquisitionsPriorToImpaktAcquisitionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisitions prior to Impakt acquisition</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_cls_AcquisitionsPriorToImpaktAcquisitionMember" xlink:href="cls-20211231.xsd#cls_AcquisitionsPriorToImpaktAcquisitionMember"/>
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    <link:label id="lab_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable_77a75c15-659c-4735-ad59-82d01ef2f7ae_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of reconciliation of changes in intangible assets and goodwill [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of reconciliation of changes in intangible assets and goodwill [table]</link:label>
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    <link:label id="lab_cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingPeriod_d7877c78-7539-4dc7-aa18-31a2b3942e51_terseLabel_en-US" xlink:label="lab_cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vesting period</link:label>
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    <link:label id="lab_ifrs-full_AssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomers_38a421c3-9abb-453d-8e75-8d17ec39c19a_terseLabel_en-US" xlink:label="lab_ifrs-full_AssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred investment costs</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfClassesOfShareCapitalExplanatory_7aa53dd1-37b1-48e2-8796-6177ef0ceb74_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfClassesOfShareCapitalExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Detailed Information About Capital Transactions</link:label>
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    <link:label id="lab_cls_PaymentsToAcquireOrRedeemEntitysSharesForStockbasedPlans_documentation_en-US" xlink:label="lab_cls_PaymentsToAcquireOrRedeemEntitysSharesForStockbasedPlans" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments To Acquire Or Redeem Entity's Shares For Stock-based Plans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_PaymentsToAcquireOrRedeemEntitysSharesForStockbasedPlans" xlink:href="cls-20211231.xsd#cls_PaymentsToAcquireOrRedeemEntitysSharesForStockbasedPlans"/>
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    <link:label id="lab_cls_ShareRepurchaseProgram1Domain_ddf95b6e-e632-4735-91af-a0741935c20b_terseLabel_en-US" xlink:label="lab_cls_ShareRepurchaseProgram1Domain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share Repurchase Program [Domain]</link:label>
    <link:label id="lab_cls_ShareRepurchaseProgram1Domain_label_en-US" xlink:label="lab_cls_ShareRepurchaseProgram1Domain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share Repurchase Program1 [Domain]</link:label>
    <link:label id="lab_cls_ShareRepurchaseProgram1Domain_documentation_en-US" xlink:label="lab_cls_ShareRepurchaseProgram1Domain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Share Repurchase Program1 [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_ShareRepurchaseProgram1Domain" xlink:href="cls-20211231.xsd#cls_ShareRepurchaseProgram1Domain"/>
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    <link:label id="lab_cls_ConcentrationRiskByType1Axis_0a23841c-9223-42da-8752-2769c464ece1_terseLabel_en-US" xlink:label="lab_cls_ConcentrationRiskByType1Axis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk By Type1 [Axis]</link:label>
    <link:label id="lab_cls_ConcentrationRiskByType1Axis_label_en-US" xlink:label="lab_cls_ConcentrationRiskByType1Axis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk By Type1 [Axis]</link:label>
    <link:label id="lab_cls_ConcentrationRiskByType1Axis_documentation_en-US" xlink:label="lab_cls_ConcentrationRiskByType1Axis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk By Type1 [Axis]</link:label>
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    <link:label id="lab_srt_DirectorMember_520a23ce-0278-4319-98c8-83c427938a79_terseLabel_en-US" xlink:label="lab_srt_DirectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Director</link:label>
    <link:label id="lab_srt_DirectorMember_label_en-US" xlink:label="lab_srt_DirectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Director [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_DirectorMember" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_DirectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_DirectorMember" xlink:to="lab_srt_DirectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_SegmentGeographicalDomain_038ab02d-5f96-436e-8d56-79bcb130bde9_terseLabel_en-US" xlink:label="lab_srt_SegmentGeographicalDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:label id="lab_srt_SegmentGeographicalDomain_label_en-US" xlink:label="lab_srt_SegmentGeographicalDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
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    <link:label id="lab_ifrs-full_RestructuringProvision_eb0354f7-115c-47b3-aa20-12a6ad4aa35b_terseLabel_en-US" xlink:label="lab_ifrs-full_RestructuringProvision" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring provision</link:label>
    <link:label id="lab_ifrs-full_RestructuringProvision_label_en-US" xlink:label="lab_ifrs-full_RestructuringProvision" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring provision</link:label>
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    <link:label id="lab_ifrs-full_SegmentsMember_a7f799f3-7744-4cb5-a730-43593a800559_terseLabel_en-US" xlink:label="lab_ifrs-full_SegmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments</link:label>
    <link:label id="lab_ifrs-full_SegmentsMember_label_en-US" xlink:label="lab_ifrs-full_SegmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_SegmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SegmentsMember" xlink:to="lab_ifrs-full_SegmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset_f4beea87-e15f-4cf5-96c2-e4fb02b4b4a1_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current service cost</link:label>
    <link:label id="lab_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset_label_en-US" xlink:label="lab_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase in net defined benefit liability (asset) resulting from current service cost</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:to="lab_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ClassesOfShareCapitalAxis_893da5d4-4074-4917-ba48-989d9383381f_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfShareCapitalAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of share capital [axis]</link:label>
    <link:label id="lab_ifrs-full_ClassesOfShareCapitalAxis_label_en-US" xlink:label="lab_ifrs-full_ClassesOfShareCapitalAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of share capital [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
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    <link:label id="lab_cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnUnrealizedLoss_5d760b74-48a3-4521-bfd5-6990b3e11083_terseLabel_en-US" xlink:label="lab_cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnUnrealizedLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reasonably possible change in risk variable, impact on unrealized loss</link:label>
    <link:label id="lab_cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnUnrealizedLoss_label_en-US" xlink:label="lab_cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnUnrealizedLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Impact On Unrealized Loss</link:label>
    <link:label id="lab_cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnUnrealizedLoss_documentation_en-US" xlink:label="lab_cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnUnrealizedLoss" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Impact On Unrealized Loss</link:label>
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    <link:label id="lab_cls_ServicesAgreementRenewalTermRelatedPartyTransactions_705b2e57-fe3e-4e09-8b1b-f79299bcb32c_terseLabel_en-US" xlink:label="lab_cls_ServicesAgreementRenewalTermRelatedPartyTransactions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Renewal term of Service Agreement</link:label>
    <link:label id="lab_cls_ServicesAgreementRenewalTermRelatedPartyTransactions_label_en-US" xlink:label="lab_cls_ServicesAgreementRenewalTermRelatedPartyTransactions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Services Agreement, Renewal Term, Related Party Transactions</link:label>
    <link:label id="lab_cls_ServicesAgreementRenewalTermRelatedPartyTransactions_documentation_en-US" xlink:label="lab_cls_ServicesAgreementRenewalTermRelatedPartyTransactions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Services Agreement, Renewal Term, Related Party Transactions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_ServicesAgreementRenewalTermRelatedPartyTransactions" xlink:href="cls-20211231.xsd#cls_ServicesAgreementRenewalTermRelatedPartyTransactions"/>
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    <link:label id="lab_currency_AllCurrenciesDomain_62723441-92f4-4390-99e5-dcb1415cf70f_terseLabel_en-US" xlink:label="lab_currency_AllCurrenciesDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">All Currencies [Domain]</link:label>
    <link:label id="lab_currency_AllCurrenciesDomain_label_en-US" xlink:label="lab_currency_AllCurrenciesDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">All Currencies [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain" xlink:href="https://xbrl.sec.gov/currency/2021/currency-2021.xsd#currency_AllCurrenciesDomain"/>
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    <link:label id="lab_cls_LeasesNumberOfExtensionOptions_98ed45be-4e18-4ed6-811e-fd8021018612_terseLabel_en-US" xlink:label="lab_cls_LeasesNumberOfExtensionOptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of extension options</link:label>
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    <link:label id="lab_cls_LeasesNumberOfExtensionOptions_documentation_en-US" xlink:label="lab_cls_LeasesNumberOfExtensionOptions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases, Number Of Extension Options</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_LeasesNumberOfExtensionOptions" xlink:href="cls-20211231.xsd#cls_LeasesNumberOfExtensionOptions"/>
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    <link:label id="lab_ifrs-full_DisclosureOfProvisionsExplanatory_7a1f9971-4f37-4aa6-add6-59eb65372e88_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfProvisionsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provisions</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfProvisionsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfProvisionsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of provisions [text block]</link:label>
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    <link:label id="lab_ifrs-full_LandMember_80668d58-1c3c-4aab-841e-a92a72ce4015_terseLabel_en-US" xlink:label="lab_ifrs-full_LandMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Land</link:label>
    <link:label id="lab_ifrs-full_LandMember_label_en-US" xlink:label="lab_ifrs-full_LandMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Land [member]</link:label>
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    <link:label id="lab_ifrs-full_Provisions_466a64d4-cb2b-4bb3-baf5-bf3d0caf3bc4_totalLabel_en-US" xlink:label="lab_ifrs-full_Provisions" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total provisions</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Provisions" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_Provisions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Provisions" xlink:to="lab_ifrs-full_Provisions" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_NumberOfSites_3725172c-26d4-416d-bd6a-8c38c631479a_terseLabel_en-US" xlink:label="lab_cls_NumberOfSites" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of sites</link:label>
    <link:label id="lab_cls_NumberOfSites_label_en-US" xlink:label="lab_cls_NumberOfSites" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Sites</link:label>
    <link:label id="lab_cls_NumberOfSites_documentation_en-US" xlink:label="lab_cls_NumberOfSites" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Sites</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_NumberOfSites" xlink:href="cls-20211231.xsd#cls_NumberOfSites"/>
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    <link:label id="lab_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_9c25c8e1-b83f-4778-8e62-e5b839e1ec3d_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of nature and extent of risks arising from financial instruments [line items]</link:label>
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    <link:label id="lab_cls_PercentageOfInterestsHeldByPrivatelyHeldCompanyRelatedPartyTransactions_1279ef4e-dea7-48d6-89a3-680668c9985c_terseLabel_en-US" xlink:label="lab_cls_PercentageOfInterestsHeldByPrivatelyHeldCompanyRelatedPartyTransactions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of interests in the Property Purchaser held by a Privately-held company (percent)</link:label>
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    <link:label id="lab_cls_PCICGUMember_44cc248a-b79c-4fe9-8943-5112be674d22_terseLabel_en-US" xlink:label="lab_cls_PCICGUMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PCI CGU</link:label>
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    <link:label id="lab_currency_CNY_c4ef45dd-330b-4069-9797-bac6ac0f640e_terseLabel_en-US" xlink:label="lab_currency_CNY" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Chinese renminbi</link:label>
    <link:label id="lab_currency_CNY_label_en-US" xlink:label="lab_currency_CNY" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">China, Yuan Renminbi</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory_4a54c94f-78c4-442c-89f5-ba37ca3f1268_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee benefits</link:label>
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    <link:label id="lab_cls_SaleOfReceivablesUnderSupplierFinancingProgramMember_f7cad105-c44f-48ec-90fb-c5978e7af72e_terseLabel_en-US" xlink:label="lab_cls_SaleOfReceivablesUnderSupplierFinancingProgramMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Factoring of receivables from supplier financing program</link:label>
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    <link:label id="lab_cls_StockRepurchasedAndRetiredDuringPeriodShares1_7b4106c4-4063-4301-9929-08d9bd9837d1_terseLabel_en-US" xlink:label="lab_cls_StockRepurchasedAndRetiredDuringPeriodShares1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of SVS repurchased for cancellation (in millions) (in shares)</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory_2f55d65e-67a4-4033-9c78-3f42ff5da9ff_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign currency translation</link:label>
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    <link:label id="lab_cls_OperatingSegmentsAbstract_52829bf1-6e47-453c-92b3-63c7f8457dd4_terseLabel_en-US" xlink:label="lab_cls_OperatingSegmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Segments [Abstract]</link:label>
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    <link:label id="lab_cls_OperatingSegmentsAbstract_documentation_en-US" xlink:label="lab_cls_OperatingSegmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Segments [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_OperatingSegmentsAbstract" xlink:href="cls-20211231.xsd#cls_OperatingSegmentsAbstract"/>
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    <link:label id="lab_ifrs-full_RevenueFromContractsWithCustomers_a315e25b-3630-4151-b3db-bd61f139e133_terseLabel_en-US" xlink:label="lab_ifrs-full_RevenueFromContractsWithCustomers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue</link:label>
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    <link:label id="lab_ifrs-full_RevenueFromContractsWithCustomers_label_en-US" xlink:label="lab_ifrs-full_RevenueFromContractsWithCustomers" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from contracts with customers</link:label>
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    <link:label id="lab_ifrs-full_WritedownsReversalsOfPropertyPlantAndEquipment_b9d2027e-6726-4e3e-9af7-30f5ea1b87de_terseLabel_en-US" xlink:label="lab_ifrs-full_WritedownsReversalsOfPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Write-downs of property, plant and equipment</link:label>
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    <link:label id="lab_cls_AcquisitionCostsAndOtherAdjustments_2ed248a6-bc8c-41b5-a10a-dce399fb30e3_terseLabel_en-US" xlink:label="lab_cls_AcquisitionCostsAndOtherAdjustments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition Costs and Other</link:label>
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    <link:label id="lab_cls_AcquisitionCostsAndOtherAdjustments_documentation_en-US" xlink:label="lab_cls_AcquisitionCostsAndOtherAdjustments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition Costs and Other Adjustments</link:label>
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    <link:label id="lab_dei_EntityCentralIndexKey_cd482fb9-c2b3-4ad9-9b99-8a4ee2a94b40_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Central Index Key</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" xlink:type="arc" order="1"/>
    <link:label id="lab_stpr_TX_d916eec2-984d-4f09-b0b3-efb34b54f9b1_terseLabel_en-US" xlink:label="lab_stpr_TX" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TEXAS</link:label>
    <link:label id="lab_stpr_TX_label_en-US" xlink:label="lab_stpr_TX" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TEXAS</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_TX" xlink:href="https://xbrl.sec.gov/stpr/2021/stpr-2021.xsd#stpr_TX"/>
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    <link:label id="lab_cls_TradePayablesAccruedLiabilitiesOtherLiabilitiesAndProvisionsMember_04c6a043-8d55-4266-94d5-1fa58d0deddb_terseLabel_en-US" xlink:label="lab_cls_TradePayablesAccruedLiabilitiesOtherLiabilitiesAndProvisionsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">A/P and certain accrued and other liabilities and provisions</link:label>
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    <link:label id="lab_cls_TradePayablesAccruedLiabilitiesOtherLiabilitiesAndProvisionsMember_documentation_en-US" xlink:label="lab_cls_TradePayablesAccruedLiabilitiesOtherLiabilitiesAndProvisionsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade Payables, Accrued Liabilities, Other Liabilities And Provisions [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_TradePayablesAccruedLiabilitiesOtherLiabilitiesAndProvisionsMember" xlink:to="lab_cls_TradePayablesAccruedLiabilitiesOtherLiabilitiesAndProvisionsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_TaxExpenseIncomeWithholdingTaxOnDividendsPaid_6b8f7761-c7cc-4c7b-8a7c-6769174ff1a0_terseLabel_en-US" xlink:label="lab_cls_TaxExpenseIncomeWithholdingTaxOnDividendsPaid" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Withholding tax on dividends paid</link:label>
    <link:label id="lab_cls_TaxExpenseIncomeWithholdingTaxOnDividendsPaid_label_en-US" xlink:label="lab_cls_TaxExpenseIncomeWithholdingTaxOnDividendsPaid" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Expense (Income), Withholding Tax On Dividends Paid</link:label>
    <link:label id="lab_cls_TaxExpenseIncomeWithholdingTaxOnDividendsPaid_documentation_en-US" xlink:label="lab_cls_TaxExpenseIncomeWithholdingTaxOnDividendsPaid" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Expense (Income), Withholding Tax On Dividends Paid</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_TaxExpenseIncomeWithholdingTaxOnDividendsPaid" xlink:href="cls-20211231.xsd#cls_TaxExpenseIncomeWithholdingTaxOnDividendsPaid"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_TaxExpenseIncomeWithholdingTaxOnDividendsPaid" xlink:to="lab_cls_TaxExpenseIncomeWithholdingTaxOnDividendsPaid" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_Level1OfFairValueHierarchyMember_84a90cad-648d-490c-9fcd-e4538a15de72_terseLabel_en-US" xlink:label="lab_ifrs-full_Level1OfFairValueHierarchyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Level&#160;1</link:label>
    <link:label id="lab_ifrs-full_Level1OfFairValueHierarchyMember_label_en-US" xlink:label="lab_ifrs-full_Level1OfFairValueHierarchyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Level 1 of fair value hierarchy [member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Level1OfFairValueHierarchyMember" xlink:to="lab_ifrs-full_Level1OfFairValueHierarchyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_TwoThousandTwentyOneSBCASPPMember_156f3f8e-3cd7-444f-9bfe-43628eee04a8_terseLabel_en-US" xlink:label="lab_cls_TwoThousandTwentyOneSBCASPPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2021 SBC ASPP</link:label>
    <link:label id="lab_cls_TwoThousandTwentyOneSBCASPPMember_label_en-US" xlink:label="lab_cls_TwoThousandTwentyOneSBCASPPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Two Thousand Twenty One SBC ASPP [Member]</link:label>
    <link:label id="lab_cls_TwoThousandTwentyOneSBCASPPMember_documentation_en-US" xlink:label="lab_cls_TwoThousandTwentyOneSBCASPPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Two Thousand Twenty One SBC ASPP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_TwoThousandTwentyOneSBCASPPMember" xlink:href="cls-20211231.xsd#cls_TwoThousandTwentyOneSBCASPPMember"/>
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    <link:label id="lab_cls_CreditFacilityMember_cf784f60-7d42-4e57-a5a7-ae2c9f4fa713_verboseLabel_en-US" xlink:label="lab_cls_CreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility</link:label>
    <link:label id="lab_cls_CreditFacilityMember_4039b29e-62b1-450c-b476-35736b8dc1cd_terseLabel_en-US" xlink:label="lab_cls_CreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility</link:label>
    <link:label id="lab_cls_CreditFacilityMember_label_en-US" xlink:label="lab_cls_CreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility [Member]</link:label>
    <link:label id="lab_cls_CreditFacilityMember_documentation_en-US" xlink:label="lab_cls_CreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_CreditFacilityMember" xlink:href="cls-20211231.xsd#cls_CreditFacilityMember"/>
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    <link:label id="lab_cls_StockRepurchaseProgramNumberofSharesAuthorizedToBeRepurchased1_b744b864-7eba-41c4-9d70-228d595c1b36_terseLabel_en-US" xlink:label="lab_cls_StockRepurchaseProgramNumberofSharesAuthorizedToBeRepurchased1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares authorized to be repurchased (in shares)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_cls_StockRepurchaseProgramNumberofSharesAuthorizedToBeRepurchased1" xlink:href="cls-20211231.xsd#cls_StockRepurchaseProgramNumberofSharesAuthorizedToBeRepurchased1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_StockRepurchaseProgramNumberofSharesAuthorizedToBeRepurchased1" xlink:to="lab_cls_StockRepurchaseProgramNumberofSharesAuthorizedToBeRepurchased1" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill_211080b5-9864-4092-ab84-3c7c33971812_terseLabel_en-US" xlink:label="lab_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amortization of intangible assets</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" xlink:to="lab_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" xlink:type="arc" order="1"/>
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    <link:label id="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollForward_label_en-US" xlink:label="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Weighted-Average Exercise Price [Roll Forward]</link:label>
    <link:label id="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollForward_documentation_en-US" xlink:label="lab_cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollForward" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Weighted-Average Exercise Price [Roll Forward]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfRelatedPartyExplanatory_5e104ba2-fe71-42ac-a905-2816884b8e5e_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party Transactions</link:label>
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    <link:label id="lab_ifrs-full_IntangibleAssetsAndGoodwill_ba9527bf-b815-4690-9457-c02748d6fcad_periodStartLabel_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsAndGoodwill" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets, beginning balance</link:label>
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    <link:label id="lab_ifrs-full_IntangibleAssetsAndGoodwill_label_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsAndGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets and goodwill</link:label>
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    <link:label id="lab_ifrs-full_NotionalAmount_f40cdbcf-bf21-4857-84b7-ed93b62c859b_terseLabel_en-US" xlink:label="lab_ifrs-full_NotionalAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract amount of U.S.&#160;dollars</link:label>
    <link:label id="lab_ifrs-full_NotionalAmount_label_en-US" xlink:label="lab_ifrs-full_NotionalAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notional amount</link:label>
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    <link:label id="lab_ifrs-full_HedgedItemLiabilities_5d4d00e1-92bd-4a32-addf-435cf4c031d1_terseLabel_en-US" xlink:label="lab_ifrs-full_HedgedItemLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedged item, liabilities</link:label>
    <link:label id="lab_ifrs-full_HedgedItemLiabilities_label_en-US" xlink:label="lab_ifrs-full_HedgedItemLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedged item, liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgedItemLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_HedgedItemLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_HedgedItemLiabilities" xlink:to="lab_ifrs-full_HedgedItemLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_PercentageOfEntitiesPropertyPlantAndEquipment_1a03cb28-4a53-45b6-b4e9-a44bbdeb977f_terseLabel_en-US" xlink:label="lab_cls_PercentageOfEntitiesPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment, among countries that exceeded 10% (as a percentage of total)</link:label>
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    <link:label id="lab_cls_PercentageOfEntitiesPropertyPlantAndEquipment_documentation_en-US" xlink:label="lab_cls_PercentageOfEntitiesPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage Of Entities Property, Plant And Equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_PercentageOfEntitiesPropertyPlantAndEquipment" xlink:href="cls-20211231.xsd#cls_PercentageOfEntitiesPropertyPlantAndEquipment"/>
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    <link:label id="lab_ifrs-full_AdjustmentsForSharebasedPayments_f3d79755-9240-455d-917d-268d1ad5565f_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForSharebasedPayments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity-settled employee SBC</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForSharebasedPayments_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForSharebasedPayments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for share-based payments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForSharebasedPayments" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForSharebasedPayments"/>
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    <link:label id="lab_ifrs-full_PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset_7969b223-60e3-4a18-bbec-eca290879905_terseLabel_en-US" xlink:label="lab_ifrs-full_PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Past service cost and settlement/curtailment losses</link:label>
    <link:label id="lab_ifrs-full_PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset_09321256-82e8-485b-99d3-281c1d13cd25_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Past service cost (credit) and settlement/curtailment losses</link:label>
    <link:label id="lab_ifrs-full_PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset_label_en-US" xlink:label="lab_ifrs-full_PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in net defined benefit liability (asset) resulting from past service cost and losses (gains) arising from settlements</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset"/>
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    <link:label id="lab_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_88d76e1b-e945-4d96-b21c-a40d8431bccf_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of nature and extent of risks arising from financial instruments [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of nature and extent of risks arising from financial instruments [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable"/>
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    <link:label id="lab_cls_IncomeTaxesAbstract_f9df14e0-9376-451f-93de-1a9f22108719_terseLabel_en-US" xlink:label="lab_cls_IncomeTaxesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Taxes [Abstract]</link:label>
    <link:label id="lab_cls_IncomeTaxesAbstract_label_en-US" xlink:label="lab_cls_IncomeTaxesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Taxes [Abstract]</link:label>
    <link:label id="lab_cls_IncomeTaxesAbstract_documentation_en-US" xlink:label="lab_cls_IncomeTaxesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Taxes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_IncomeTaxesAbstract" xlink:href="cls-20211231.xsd#cls_IncomeTaxesAbstract"/>
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    <link:label id="lab_cls_SharebasedCompensationAwardTrancheOne1Member_9b23ddc2-05bf-40ba-b0f8-2a311428548c_terseLabel_en-US" xlink:label="lab_cls_SharebasedCompensationAwardTrancheOne1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">25% vested in year 1</link:label>
    <link:label id="lab_cls_SharebasedCompensationAwardTrancheOne1Member_label_en-US" xlink:label="lab_cls_SharebasedCompensationAwardTrancheOne1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Award, Tranche One1 [Member]</link:label>
    <link:label id="lab_cls_SharebasedCompensationAwardTrancheOne1Member_documentation_en-US" xlink:label="lab_cls_SharebasedCompensationAwardTrancheOne1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Award, Tranche One1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_SharebasedCompensationAwardTrancheOne1Member" xlink:href="cls-20211231.xsd#cls_SharebasedCompensationAwardTrancheOne1Member"/>
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    <link:label id="lab_cls_NumberOfCustomersPerSegment_c562cbc8-7cec-4e76-971a-c0463959eac9_terseLabel_en-US" xlink:label="lab_cls_NumberOfCustomersPerSegment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of customers per segment</link:label>
    <link:label id="lab_cls_NumberOfCustomersPerSegment_label_en-US" xlink:label="lab_cls_NumberOfCustomersPerSegment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Customers Per Segment</link:label>
    <link:label id="lab_cls_NumberOfCustomersPerSegment_documentation_en-US" xlink:label="lab_cls_NumberOfCustomersPerSegment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Customers Per Segment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_NumberOfCustomersPerSegment" xlink:href="cls-20211231.xsd#cls_NumberOfCustomersPerSegment"/>
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    <link:label id="lab_ifrs-full_PlanAssetsAtFairValue_3671913c-eeeb-41fe-bce9-079e65c035e9_terseLabel_en-US" xlink:label="lab_ifrs-full_PlanAssetsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan assets, at fair value</link:label>
    <link:label id="lab_ifrs-full_PlanAssetsAtFairValue_ae8eb669-333f-47e7-a76b-fd551f5e12a4_totalLabel_en-US" xlink:label="lab_ifrs-full_PlanAssetsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total</link:label>
    <link:label id="lab_ifrs-full_PlanAssetsAtFairValue_86848990-63eb-48c2-bac0-e3ff4bf03ebd_netLabel_en-US" xlink:label="lab_ifrs-full_PlanAssetsAtFairValue" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan assets, end of year</link:label>
    <link:label id="lab_ifrs-full_PlanAssetsAtFairValue_label_en-US" xlink:label="lab_ifrs-full_PlanAssetsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan assets, at fair value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PlanAssetsAtFairValue" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_PlanAssetsAtFairValue"/>
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    <link:label id="lab_ifrs-full_ActuarialAssumptionsMember_163cb17d-5358-49fc-83ba-8645bb7f4645_terseLabel_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Actuarial assumptions</link:label>
    <link:label id="lab_ifrs-full_ActuarialAssumptionsMember_label_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Actuarial assumptions [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ActuarialAssumptionsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ActuarialAssumptionsMember" xlink:to="lab_ifrs-full_ActuarialAssumptionsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_CostOfSales1Member_84739df2-96f6-41b1-9935-9bc9d725b49c_terseLabel_en-US" xlink:label="lab_cls_CostOfSales1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee SBC expense in cost of sales</link:label>
    <link:label id="lab_cls_CostOfSales1Member_label_en-US" xlink:label="lab_cls_CostOfSales1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cost Of Sales1 [Member]</link:label>
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    <link:label id="lab_ifrs-full_StatementOfCashFlowsAbstract_5ea7fca1-4ecd-44cc-a27f-36e72fc974c9_terseLabel_en-US" xlink:label="lab_ifrs-full_StatementOfCashFlowsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of cash flows [abstract]</link:label>
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    <link:label id="lab_ifrs-full_LegalProceedingsProvisionMember_15f0fd3c-bc1d-4075-b39d-653cfcb5a831_terseLabel_en-US" xlink:label="lab_ifrs-full_LegalProceedingsProvisionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Legal</link:label>
    <link:label id="lab_ifrs-full_LegalProceedingsProvisionMember_label_en-US" xlink:label="lab_ifrs-full_LegalProceedingsProvisionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Legal proceedings provision [member]</link:label>
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    <link:label id="lab_ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill_cf981104-0b64-4b2c-94bf-3da94a8b0370_terseLabel_en-US" xlink:label="lab_ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisitions through business combination</link:label>
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    <link:label id="lab_cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnOtherComprehensiveIncome_aa29b64b-e846-4df3-a022-671a8d928728_terseLabel_en-US" xlink:label="lab_cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnOtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reasonably possible increase in risk variable, impact on other comprehensive income</link:label>
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    <link:label id="lab_ifrs-full_CategoriesOfRelatedPartiesAxis_87d63884-ff15-4883-97c4-837a479fd8f0_terseLabel_en-US" xlink:label="lab_ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Categories of related parties [axis]</link:label>
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    <link:label id="lab_cls_AtrenneCGUMember_6ad57cb1-0e36-47fb-aa29-7b1c6eb12e8b_terseLabel_en-US" xlink:label="lab_cls_AtrenneCGUMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Atrenne CGU</link:label>
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    <link:label id="lab_cls_AtrenneCGUMember_documentation_en-US" xlink:label="lab_cls_AtrenneCGUMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Atrenne CGU [Member]</link:label>
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    <link:label id="lab_cls_AdministrativeExpensesNetDefinedBenefitLiabilityAsset_859ed44b-2cae-4175-b1da-adc18d2d5b7c_negatedLabel_en-US" xlink:label="lab_cls_AdministrativeExpensesNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Administrative expenses paid from plan assets</link:label>
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    <link:label id="lab_ifrs-full_InterestRateRiskMember_c069a358-4ad2-43fc-9c61-6e0d939093a0_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestRateRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest rate swaps</link:label>
    <link:label id="lab_ifrs-full_InterestRateRiskMember_label_en-US" xlink:label="lab_ifrs-full_InterestRateRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest rate risk [member]</link:label>
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    <link:label id="lab_ifrs-full_PercentageOfVotingEquityInterestsAcquired_3aaf8966-456f-4cf8-9ce3-60466df933db_terseLabel_en-US" xlink:label="lab_ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of voting equity interests acquired</link:label>
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    <link:label id="lab_cls_ReductionInCostOfSalesGovernmentSubsidies_documentation_en-US" xlink:label="lab_cls_ReductionInCostOfSalesGovernmentSubsidies" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reduction In Cost Of Sales, Government Subsidies</link:label>
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    <link:label id="lab_ifrs-full_ProceedsFromExerciseOfOptions_0353b435-8117-4e7f-9aac-e15fefd05aa5_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromExerciseOfOptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from exercise of options</link:label>
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    <link:label id="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember_5ed83a8f-acb7-45f3-947b-e0d531d05e44_terseLabel_en-US" xlink:label="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign currency</link:label>
    <link:label id="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember_label_en-US" xlink:label="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reserve of exchange differences on translation [member]</link:label>
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    <link:label id="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_587f4719-cb3c-482f-8082-5367079b5a33_terseLabel_en-US" xlink:label="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Temporary difference, unused tax losses and unused tax credits [axis]</link:label>
    <link:label id="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_label_en-US" xlink:label="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Temporary difference, unused tax losses and unused tax credits [axis]</link:label>
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    <link:label id="lab_ifrs-full_WeightedAverageShares_ea73964c-c1da-4f69-9698-4c0dc6581ae5_terseLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Basic (in shares)</link:label>
    <link:label id="lab_ifrs-full_WeightedAverageShares_4ca63e3b-f92e-41ea-81cf-2cc1424d4220_verboseLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageShares" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average number of shares (basic) (in shares)</link:label>
    <link:label id="lab_ifrs-full_WeightedAverageShares_label_en-US" xlink:label="lab_ifrs-full_WeightedAverageShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average number of ordinary shares used in calculating basic earnings per share</link:label>
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    <link:label id="lab_dei_AuditorFirmId_91709ace-5cd0-495c-932a-cd8cfd07f240_terseLabel_en-US" xlink:label="lab_dei_AuditorFirmId" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Auditor Firm ID</link:label>
    <link:label id="lab_dei_AuditorFirmId_label_en-US" xlink:label="lab_dei_AuditorFirmId" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Auditor Firm ID</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AuditorFirmId" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_AuditorFirmId"/>
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    <link:label id="lab_ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan_24a6ab0f-1370-4109-8814-fe3a99079285_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current other post-employment benefit obligations</link:label>
    <link:label id="lab_ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan_label_en-US" xlink:label="lab_ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current net defined benefit liability</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory_838ad1a1-f37c-4210-81e8-dffe283a6e94_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill and intangible assets</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfGeographicalAreasLineItems_bda76d96-974e-48fe-b260-0caf0f2a360d_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfGeographicalAreasLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of geographical areas [line items]</link:label>
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    <link:label id="lab_currency_RON_e011e9e3-f0aa-4103-8712-0445a52ea687_terseLabel_en-US" xlink:label="lab_currency_RON" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Romanian Leu</link:label>
    <link:label id="lab_currency_RON_label_en-US" xlink:label="lab_currency_RON" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Romania, New Lei</link:label>
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    <link:label id="lab_ifrs-full_GainsLossesOnCashFlowHedgesNetOfTax_4b6a0d5d-8067-45e6-85c2-27e9868a0a72_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnCashFlowHedgesNetOfTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net gain (loss) on cash flow hedges</link:label>
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    <link:label id="lab_cls_EquityInstrumentsOtherThanOptionsGrantedInPeriodPercentageOfTarget_8f666dc3-f50c-4715-9308-37f37ce4a4b2_terseLabel_en-US" xlink:label="lab_cls_EquityInstrumentsOtherThanOptionsGrantedInPeriodPercentageOfTarget" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other equity instruments, granted, percentage of target</link:label>
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    <link:label id="lab_cls_BusinessCombinations1Abstract_dbeca53d-5f2d-406f-81a0-ecfbee7935d1_terseLabel_en-US" xlink:label="lab_cls_BusinessCombinations1Abstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Combinations1 [Abstract]</link:label>
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    <link:label id="lab_cls_InsuranceAnnuitiesAmountContributedToFairValueofPlanAssetsAllocationPercentage_documentation_en-US" xlink:label="lab_cls_InsuranceAnnuitiesAmountContributedToFairValueofPlanAssetsAllocationPercentage" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Insurance Annuities, Amount Contributed To Fair Value of Plan Assets, Allocation Percentage</link:label>
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    <link:label id="lab_cls_AutomaticSharePurchasePlanASPPMember_2af95167-ef1d-4daa-95fd-5629b0f928f5_terseLabel_en-US" xlink:label="lab_cls_AutomaticSharePurchasePlanASPPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ASPP</link:label>
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    <link:label id="lab_ifrs-full_CostOfSales_60b471f7-f7b0-4619-9029-825feb097733_terseLabel_en-US" xlink:label="lab_ifrs-full_CostOfSales" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cost of sales</link:label>
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    <link:label id="lab_currency_EUR_55c10273-1d23-4a7a-9583-aad81d108578_terseLabel_en-US" xlink:label="lab_currency_EUR" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Euro</link:label>
    <link:label id="lab_currency_EUR_label_en-US" xlink:label="lab_currency_EUR" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Euro Member Countries, Euro</link:label>
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    <link:label id="lab_cls_DerecognitionOfFinancialAssetsByTypeOfTransferAxis_72467ebd-2c3c-489f-9079-a9f6fe8f7092_terseLabel_en-US" xlink:label="lab_cls_DerecognitionOfFinancialAssetsByTypeOfTransferAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derecognition of Financial Assets by Type of Transfer [axis]</link:label>
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    <link:label id="lab_ifrs-full_SurplusDeficitInPlan_fea23ad6-7daa-44e3-a831-c659ad41a64f_totalLabel_en-US" xlink:label="lab_ifrs-full_SurplusDeficitInPlan" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deficiency of plan assets over accrued benefit obligations</link:label>
    <link:label id="lab_ifrs-full_SurplusDeficitInPlan_label_en-US" xlink:label="lab_ifrs-full_SurplusDeficitInPlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Surplus (deficit) in plan</link:label>
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    <link:label id="lab_cls_TreasuryStockValueAcquiredCostMethodHeldByTrustee_702d2fe3-b71a-4cd8-8772-6204fdc894b6_terseLabel_en-US" xlink:label="lab_cls_TreasuryStockValueAcquiredCostMethodHeldByTrustee" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value of SVS held by trustee for delivery under SBC plans</link:label>
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    <link:label id="lab_ifrs-full_UnusedTaxLossesMember_43568813-529a-4af1-9d01-79b60672a3cb_terseLabel_en-US" xlink:label="lab_ifrs-full_UnusedTaxLossesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax losses carried forward</link:label>
    <link:label id="lab_ifrs-full_UnusedTaxLossesMember_label_en-US" xlink:label="lab_ifrs-full_UnusedTaxLossesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unused tax losses [member]</link:label>
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    <link:label id="lab_ifrs-full_ComponentsOfEquityAxis_64eba187-6f74-4bdb-ad6a-7cfb4264026b_terseLabel_en-US" xlink:label="lab_ifrs-full_ComponentsOfEquityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Components of equity [axis]</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory_b2340af1-63de-4c1c-aab9-b4a2a93bd77f_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes</link:label>
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    <link:label id="lab_cls_DebtIssuanceCostsLineofCreditArrangementsNet1_61cf7e1f-1fc5-40c1-8e97-da2732e6dea6_terseLabel_en-US" xlink:label="lab_cls_DebtIssuanceCostsLineofCreditArrangementsNet1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred financing costs</link:label>
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    <link:label id="lab_cls_ChinaAndThailandMember_aa62cf65-30a0-459d-affd-fe876dc58019_terseLabel_en-US" xlink:label="lab_cls_ChinaAndThailandMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">China And Thailand</link:label>
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    <link:label id="lab_cls_InventoriesAbstract_e20ef85a-bfa7-448c-b5ae-22e3b033ef76_terseLabel_en-US" xlink:label="lab_cls_InventoriesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventories [Abstract]</link:label>
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    <link:label id="lab_cls_InventoriesAbstract_documentation_en-US" xlink:label="lab_cls_InventoriesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventories [Abstract]</link:label>
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    <link:label id="lab_cls_OtherComprehensiveIncomeNetOfTaxGainLossOnDefinedBenefitPlans_be0cc5b2-f9a5-42fe-8369-0b696fe456a7_terseLabel_en-US" xlink:label="lab_cls_OtherComprehensiveIncomeNetOfTaxGainLossOnDefinedBenefitPlans" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on pension and non-pension post-employment benefit plans</link:label>
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    <link:label id="lab_cls_PlanAssetsAtFairValueAllocationPercentage_cd0ad2bb-e8df-4eb7-95e8-907ed723ed8c_totalLabel_en-US" xlink:label="lab_cls_PlanAssetsAtFairValueAllocationPercentage" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total, allocation percentage</link:label>
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    <link:label id="lab_cls_PlanAssetsAtFairValueAllocationPercentage_documentation_en-US" xlink:label="lab_cls_PlanAssetsAtFairValueAllocationPercentage" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Assets At Fair Value, Allocation Percentage</link:label>
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    <link:label id="lab_cls_RiskFreeInterestRateOtherEquityInstrumentsGranted_1741ba58-ee7d-4f11-b0f8-e4a28a31cdf7_terseLabel_en-US" xlink:label="lab_cls_RiskFreeInterestRateOtherEquityInstrumentsGranted" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risk-free interest rate (based on 3-year Treasury bonds)</link:label>
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    <link:label id="lab_cls_RiskFreeInterestRateOtherEquityInstrumentsGranted_documentation_en-US" xlink:label="lab_cls_RiskFreeInterestRateOtherEquityInstrumentsGranted" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risk Free Interest Rate, Other Equity Instruments Granted</link:label>
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    <link:label id="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_25619982-ea44-4311-b480-6fbb3e9b4817_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of share-based payment arrangements [axis]</link:label>
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    <link:label id="lab_cls_AsianSubsidiaryMember_6006437c-ff41-4254-b9fe-47f076512ec4_terseLabel_en-US" xlink:label="lab_cls_AsianSubsidiaryMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asian Subsidiary</link:label>
    <link:label id="lab_cls_AsianSubsidiaryMember_label_en-US" xlink:label="lab_cls_AsianSubsidiaryMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asian Subsidiary [Member]</link:label>
    <link:label id="lab_cls_AsianSubsidiaryMember_documentation_en-US" xlink:label="lab_cls_AsianSubsidiaryMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asian Subsidiary [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_AsianSubsidiaryMember" xlink:href="cls-20211231.xsd#cls_AsianSubsidiaryMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_AsianSubsidiaryMember" xlink:to="lab_cls_AsianSubsidiaryMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashEquivalents_80472e1e-8006-4da4-8e0a-b277d907fc6a_terseLabel_en-US" xlink:label="lab_ifrs-full_CashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash equivalents</link:label>
    <link:label id="lab_ifrs-full_CashEquivalents_label_en-US" xlink:label="lab_ifrs-full_CashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash equivalents</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashEquivalents" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CashEquivalents"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashEquivalents" xlink:to="lab_ifrs-full_CashEquivalents" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsInSharebasedPaymentArrangementExercisedDuringPeriodAtDateOfExercise2019_ba773e54-2bf8-4320-a217-801abea36885_terseLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsInSharebasedPaymentArrangementExercisedDuringPeriodAtDateOfExercise2019" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average exercise price, exercised (in dollars per share)</link:label>
    <link:label id="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsInSharebasedPaymentArrangementExercisedDuringPeriodAtDateOfExercise2019_label_en-US" xlink:label="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsInSharebasedPaymentArrangementExercisedDuringPeriodAtDateOfExercise2019" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average share price for share options in share-based payment arrangement exercised during period at date of exercise</link:label>
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    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_785778f0-7dc9-4ad4-ba5b-0ad4bd8908c2_terseLabel_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets other than goodwill</link:label>
    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_label_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets other than goodwill [member]</link:label>
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    <link:label id="lab_cls_IncomeTaxExpenseIncomeImpactOfForeignExchangeTranslation_ab19a5f7-77e1-4f82-ab3f-22753c947b0c_terseLabel_en-US" xlink:label="lab_cls_IncomeTaxExpenseIncomeImpactOfForeignExchangeTranslation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Favorable currency impacts</link:label>
    <link:label id="lab_cls_IncomeTaxExpenseIncomeImpactOfForeignExchangeTranslation_label_en-US" xlink:label="lab_cls_IncomeTaxExpenseIncomeImpactOfForeignExchangeTranslation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Expense (Income), Impact Of Foreign Exchange Translation</link:label>
    <link:label id="lab_cls_IncomeTaxExpenseIncomeImpactOfForeignExchangeTranslation_documentation_en-US" xlink:label="lab_cls_IncomeTaxExpenseIncomeImpactOfForeignExchangeTranslation" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Expense (Income), Impact Of Foreign Exchange Translation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_IncomeTaxExpenseIncomeImpactOfForeignExchangeTranslation" xlink:href="cls-20211231.xsd#cls_IncomeTaxExpenseIncomeImpactOfForeignExchangeTranslation"/>
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    <link:label id="lab_cls_DeferredTaxLiabilitiesAndOtherNoncurrentLiabilitiesRecognizedAsOfAcquisitionDate_9474385f-f1c9-40fc-a32c-9b60d101bb7d_negatedTerseLabel_en-US" xlink:label="lab_cls_DeferredTaxLiabilitiesAndOtherNoncurrentLiabilitiesRecognizedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred income taxes and other long-term liabilities</link:label>
    <link:label id="lab_cls_DeferredTaxLiabilitiesAndOtherNoncurrentLiabilitiesRecognizedAsOfAcquisitionDate_label_en-US" xlink:label="lab_cls_DeferredTaxLiabilitiesAndOtherNoncurrentLiabilitiesRecognizedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Liabilities And Other Non-current Liabilities Recognized As Of Acquisition Date</link:label>
    <link:label id="lab_cls_DeferredTaxLiabilitiesAndOtherNoncurrentLiabilitiesRecognizedAsOfAcquisitionDate_documentation_en-US" xlink:label="lab_cls_DeferredTaxLiabilitiesAndOtherNoncurrentLiabilitiesRecognizedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Liabilities And Other Non-current Liabilities Recognized As Of Acquisition Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_DeferredTaxLiabilitiesAndOtherNoncurrentLiabilitiesRecognizedAsOfAcquisitionDate" xlink:href="cls-20211231.xsd#cls_DeferredTaxLiabilitiesAndOtherNoncurrentLiabilitiesRecognizedAsOfAcquisitionDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cls_DeferredTaxLiabilitiesAndOtherNoncurrentLiabilitiesRecognizedAsOfAcquisitionDate" xlink:to="lab_cls_DeferredTaxLiabilitiesAndOtherNoncurrentLiabilitiesRecognizedAsOfAcquisitionDate" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_BankOverdraftsClassifiedAsCashEquivalents_bd5e84d8-7310-4cdc-b7a1-dcba33fde23b_terseLabel_en-US" xlink:label="lab_ifrs-full_BankOverdraftsClassifiedAsCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amounts outstanding under available uncommitted bank overdraft facilities</link:label>
    <link:label id="lab_ifrs-full_BankOverdraftsClassifiedAsCashEquivalents_label_en-US" xlink:label="lab_ifrs-full_BankOverdraftsClassifiedAsCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bank overdrafts</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BankOverdraftsClassifiedAsCashEquivalents" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_BankOverdraftsClassifiedAsCashEquivalents"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BankOverdraftsClassifiedAsCashEquivalents" xlink:to="lab_ifrs-full_BankOverdraftsClassifiedAsCashEquivalents" xlink:type="arc" order="1"/>
    <link:label id="lab_cls_LineOfCreditFacilityMaximumBorrowingCapacity1_70ceaadf-54eb-4182-9ed3-563fb871760e_terseLabel_en-US" xlink:label="lab_cls_LineOfCreditFacilityMaximumBorrowingCapacity1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of credit, maximum borrowing capacity</link:label>
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    <link:label id="lab_cls_LineOfCreditFacilityMaximumBorrowingCapacity1_documentation_en-US" xlink:label="lab_cls_LineOfCreditFacilityMaximumBorrowingCapacity1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line Of Credit Facility, Maximum Borrowing Capacity1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_cls_LineOfCreditFacilityMaximumBorrowingCapacity1" xlink:href="cls-20211231.xsd#cls_LineOfCreditFacilityMaximumBorrowingCapacity1"/>
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    <link:label id="lab_ifrs-full_TypesOfRisksMember_51d61c78-37d8-4b94-8d14-53d4ad72eda4_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfRisksMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risks</link:label>
    <link:label id="lab_ifrs-full_TypesOfRisksMember_label_en-US" xlink:label="lab_ifrs-full_TypesOfRisksMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risks [member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TypesOfRisksMember" xlink:to="lab_ifrs-full_TypesOfRisksMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_1ed0c50d-87d3-43f6-aa23-ff36c822af50_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisitions</link:label>
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