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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2016-08-08</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001088787</issuerCik>
        <issuerName>CD INTERNATIONAL ENTERPRISES, INC.</issuerName>
        <issuerTradingSymbol>CDII</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001373469</rptOwnerCik>
            <rptOwnerName>Wang Yuejian</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CHINA DIRECT INDUSTRIES, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>431 FAIRWAY DRIVE, SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>DEERFIELD BEACH</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33441</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Executive Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $0.0001 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2016-08-08</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>65000000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.002</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>65003236</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">On August 10, 2016, the Issuer issued 65,000,000 shares of restricted common stock to the reporting person as compensation pursuant to Employment Agreement instead of cash payment.</footnote>
        <footnote id="F2">Amount does not include 20,000 shares of the Issuer's common stock held by Dragon Fund Management LLC (&quot;Dragon Fund&quot;), an entity in which the reporting person owns 1% of the membership interests and holds 50% of the voting control. The reporting person disclaims beneficial ownership of the Issuer's securities owned by Dragon Fund except to the extent of his pecuniary interest in Dragon Fund and this filing should not be construed as an admission that the reporting person is the beneficial owner of these securities.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Yuejian (Jame) Wang</signatureName>
        <signatureDate>2016-08-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
