    <SEC-DOCUMENT>0001193125-23-240617-index.html : 20230922
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    <ACCEPTANCE-DATETIME>20230922170925
    ACCESSION NUMBER:		0001193125-23-240617
    CONFORMED SUBMISSION TYPE:	N-14 8C
    PUBLIC DOCUMENT COUNT:		19
    FILED AS OF DATE:		20230922
    DATE AS OF CHANGE:		20230922

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			BLACKROCK MUNIYIELD QUALITY FUND III, INC.
    		CENTRAL INDEX KEY:			0000883412
    		IRS NUMBER:				223165131
    		FISCAL YEAR END:			1031

    	FILING VALUES:
    		FORM TYPE:		N-14 8C
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-274660
    		FILM NUMBER:		231272416

    	BUSINESS ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809
    		BUSINESS PHONE:		800-441-7762

    	MAIL ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	BLACKROCK MUNIYIELD QUALITY FUND III, INC
    		DATE OF NAME CHANGE:	20101109

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	BLACKROCK MUNIYIELD INSURED FUND, INC
    		DATE OF NAME CHANGE:	20070612

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	MUNIYIELD INSURED FUND INC
    		DATE OF NAME CHANGE:	19920717
    <IS-FUND-24F2-ELIGIBLE>N
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>N-14 8C
    <SEQUENCE>1
    <FILENAME>d555595dn148c.htm
    <DESCRIPTION>BLACKROCK MUNIYIELD QUALITY FUND III, INC.
    <TEXT>
    Document 1 - file: d555595dn148c.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1(T)
    <SEQUENCE>2
    <FILENAME>d555595dex991t.htm
    <DESCRIPTION>ARTICLES OF AMENDMENT DATED JANUARY 19, 2023
    <TEXT>
    Document 2 - file: d555595dex991t.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1(U)
    <SEQUENCE>3
    <FILENAME>d555595dex991u.htm
    <DESCRIPTION>ARTICLES OF AMENDMENT DATED JUNE 15, 2023
    <TEXT>
    Document 3 - file: d555595dex991u.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.(16)
    <SEQUENCE>4
    <FILENAME>d555595dex9916.htm
    <DESCRIPTION>POWER OF ATTORNEY OF THE BOARD OF DIRECTORS
    <TEXT>
    Document 4 - file: d555595dex9916.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.(17)
    <SEQUENCE>5
    <FILENAME>d555595dex9917.htm
    <DESCRIPTION>FORM OF PROXY CARDS FOR COMMON SHARES OF THE FUNDS
    <TEXT>
    Document 5 - file: d555595dex9917.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-FILING FEES
    <SEQUENCE>6
    <FILENAME>d555595dexfilingfees.htm
    <DESCRIPTION>CALCULATION OF FILING FEES TABLES
    <TEXT>
    Document 6 - file: d555595dexfilingfees.htm

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    <DESCRIPTION>GRAPHIC
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: g555595g24g24.jpg

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    <SEQUENCE>10
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: g555595g26g26.jpg

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    <SEQUENCE>11
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: g555595g28g28.jpg

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    <SEQUENCE>12
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: g555595g29m96.jpg

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    <SEQUENCE>13
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: g555595g30g30.jpg

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    <SEQUENCE>14
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: g555595g32g32.jpg

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    <SEQUENCE>15
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: g555595g34g34.jpg

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    <SEQUENCE>16
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: g555595g36g36.jpg

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    <SEQUENCE>17
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: g555595g38g38.jpg

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    <SEQUENCE>18
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: g555595g40g40.jpg

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    <SEQUENCE>19
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: g555595g43i86.jpg

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    <SEQUENCE>20
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: g555595g49e04.jpg

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