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  <xs:element id="smur_A1000MillionSeniorGreenNotesDue2034Member" abstract="true" name="A1000MillionSeniorGreenNotesDue2034Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_A850MillionSeniorGreenNotesDue2035Member" abstract="true" name="A850MillionSeniorGreenNotesDue2035Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_A800MillionSeniorGreenNotesDue2036Member" abstract="true" name="A800MillionSeniorGreenNotesDue2036Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_A600MillionSeniorGreenNotesDue2036Member" abstract="true" name="A600MillionSeniorGreenNotesDue2036Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_A3MillionSeniorNotesDue2037Member" abstract="true" name="A3MillionSeniorNotesDue2037Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_A150MillionSeniorNotesDue2047Member" abstract="true" name="A150MillionSeniorNotesDue2047Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_A1000MillionSeniorGreenNotesDue2054Member" abstract="true" name="A1000MillionSeniorGreenNotesDue2054Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_FinanceLeaseLiabilityGross" abstract="false" name="FinanceLeaseLiabilityGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smur_DebtAndLeaseObligationGrossExcludingDebtIssuanceCosts" abstract="false" name="DebtAndLeaseObligationGrossExcludingDebtIssuanceCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smur_DebtInstrumentUnamortizedFairValueAdjustmentDiscountPremiumAndDebtIssuanceCostsNet" abstract="false" name="DebtInstrumentUnamortizedFairValueAdjustmentDiscountPremiumAndDebtIssuanceCostsNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smur_RevolvingCreditFacilitiesAgreementMember" abstract="true" name="RevolvingCreditFacilitiesAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_A330MillionReceivablesSecuritizationVariableFundingNotesDue2029Member" abstract="true" name="A330MillionReceivablesSecuritizationVariableFundingNotesDue2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_A700MillionReceivablesSecuritizationDue2027Member" abstract="true" name="A700MillionReceivablesSecuritizationDue2027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_DebtInstrumentTermExtensionPeriod" abstract="false" name="DebtInstrumentTermExtensionPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="smur_NumberOfTradeReceivablesSecuritizationPrograms" abstract="false" name="NumberOfTradeReceivablesSecuritizationPrograms" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="smur_UnrecognizedTaxBenefitsIncreaseResultingFromAccruedInterestAndPenalties" abstract="false" name="UnrecognizedTaxBenefitsIncreaseResultingFromAccruedInterestAndPenalties" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smur_UnrecognizedTaxBenefitsNonRecurringAdjustmentToCertainDeferredTaxAssets" abstract="false" name="UnrecognizedTaxBenefitsNonRecurringAdjustmentToCertainDeferredTaxAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smur_UnrecognizedTaxBenefitsDecreaseResultingFromReversalOfInterestAndPenaltiesRelatedToLapseOfApplicableStatuteOfLimitations" abstract="false" name="UnrecognizedTaxBenefitsDecreaseResultingFromReversalOfInterestAndPenaltiesRelatedToLapseOfApplicableStatuteOfLimitations" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smur_EarningsPerShareBasicAndDilutedEPSAbstract" abstract="true" name="EarningsPerShareBasicAndDilutedEPSAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="smur_BrazilTaxLiabilityMember" abstract="true" name="BrazilTaxLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_ItalianCompetitionAuthorityInvestigationMember" abstract="true" name="ItalianCompetitionAuthorityInvestigationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_InternationalArbitrationAgainstVenezuelaMember" abstract="true" name="InternationalArbitrationAgainstVenezuelaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_SupracompetitivePricesLitigationMember" abstract="true" name="SupracompetitivePricesLitigationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_MergerNumberOfSubsidiaries" abstract="false" name="MergerNumberOfSubsidiaries" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="smur_NumberOfProceedings" abstract="false" name="NumberOfProceedings" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="smur_NumberOfLawsuits" abstract="false" name="NumberOfLawsuits" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="smur_LitigationTotalNumberOfCompanies" abstract="false" name="LitigationTotalNumberOfCompanies" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="smur_LossContingencyLegalCostsAwardedValue" abstract="false" name="LossContingencyLegalCostsAwardedValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smur_LitigationNumberOfOtherIndustryParticipants" abstract="false" name="LitigationNumberOfOtherIndustryParticipants" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="smur_AOCIOtherReservesParentMember" abstract="true" name="AOCIOtherReservesParentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smur_AccumulatedDefinedBenefitPlansAdjustmentForeignCurrencyMember" abstract="true" name="AccumulatedDefinedBenefitPlansAdjustmentForeignCurrencyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
