<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-08-26</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001770561</issuerCik>
        <issuerName>Coronado Global Resources Inc.</issuerName>
        <issuerTradingSymbol>ASX:CRN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001817779</rptOwnerCik>
            <rptOwnerName>Ziems Gerhard</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CORONADO GLOBAL RESOURCES INC.</rptOwnerStreet1>
            <rptOwnerStreet2>100 BILL BAKER WAY</rptOwnerStreet2>
            <rptOwnerCity>BECKLEY</rptOwnerCity>
            <rptOwnerState>WV</rptOwnerState>
            <rptOwnerZipCode>25801</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Group Chief Financial Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2020-08-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>30769.2</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>4.39</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>30769.2</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F3"/>
            </securityTitle>
            <transactionDate>
                <value>2020-08-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2666.6</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>4.35</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>33435.8</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Reflects an open market purchase of 307,692 of the Issuer's Chess Depositary Interests (&quot;CDIs&quot;). CDIs are units of beneficial ownership in shares of common stock of the Issuer that are publicly traded on the Australian Securities Exchange (the &quot;ASX&quot;) and held by CHESS Depositary Nominees Pty, Limited (&quot;CDN&quot;), a subsidiary of ASX Limited, the company that operates the ASX. The CDIs are convertible into shares of common stock of the Issuer on a 10-for-1 basis.</footnote>
        <footnote id="F2">The purchase was executed in the form of CDIs, trading on the ASX, and as such the purchase price has been converted to a U.S. Dollar equivalent, adjusting for the conversion ratio of 1 share of common stock per 10 CDIs.</footnote>
        <footnote id="F3">Reflects an open market purchase of 26,666 of the Issuer's CDIs. CDIs are units of beneficial ownership in shares of common stock of the Issuer that are publicly traded on the ASX and held by CDN. The CDIs are convertible into shares of common stock of the Issuer on a 10-for-1 basis.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Richard Rose, as Attorney-in-Fact</signatureName>
        <signatureDate>2020-08-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
