PAGE 1
000 A000000 01/31/2018
000 C000000 0000883412
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 BLACKROCK MUNIYIELD QUALITY FUND III, INC.
001 B000000 811-06540
001 C000000 8004417762
002 A000000 100 BELLEVUE PARKWAY
002 B000000 WILMINGTON
002 C000000 DE
002 D010000 19809
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
007 C010100 1
008 A000001 BLACKROCK ADVISORS, LLC
008 B000001 A
008 C000001 801-47710
008 D010001 WILMINGTON
008 D020001 DE
008 D030001 19809
012 A000001 COMPUTERSHARE TRUST COMPANY, N.A. (COMMON)
012 B000001 85-11340
012 C010001 CANTON
012 C020001 MA
012 C030001 02021
012 A000002 THE BANK OF NEW YORK MELLON (PREFERRED)
012 B000002 85-05006
012 C010002 NEW YORK
012 C020002 NY
012 C030002 10286
013 A000001 DELOITTE & TOUCHE LLP
013 B010001 BOSTON
013 B020001 MA
013 B030001 02116
014 A000001 BLACKROCK EXECUTION SERVICES
014 B000001 8-48719
014 A000002 BLACKROCK INVESTMENTS, LLC
014 B000002 8-48436
014 A000003 HARRIS WILLIAMS LLC
014 B000003 8-53380
014 A000004 PNC CAPITAL MARKETS, INC.
014 B000004 8-32493
PAGE 2
014 A000005 PNC INVESTMENTS LLC
014 B000005 8-66195
014 A000006 SOLEBURY CAPITAL, LLC
014 B000006 8-67548
015 A000001 State Street Bank and Trust Company
015 B000001 C
015 C010001 Boston
015 C020001 MA
015 C030001 02111
015 E010001 X
018 000000 Y
019 A000000 Y
019 B000000 274
019 C000000 BLKRKADVSR
020 A000001 BANK OF AMERICA CORP
020 B000001 56-0906609
020 C000001 5
021 000000 5
022 A000001 BLACKROCK LIQUIDITY FUNDS, MUNICASH
022 B000001 52-0983343
022 C000001 160352
022 D000001 150807
022 A000002 BANK OF AMERICA CORP
022 B000002 56-0906609
022 C000002 37602
022 D000002 9345
022 A000003 CITIGROUP GLOBAL MARKETS INC.
022 B000003 11-2418191
022 C000003 18527
022 D000003 23364
022 A000004 RBC Capital Markets, LLC
022 B000004 41-1228350
022 C000004 27241
022 D000004 5274
022 A000005 WELLS FARGO BANK NA
022 B000005 94-1347393
022 C000005 23104
022 D000005 5504
022 A000006 RAYMOND JAMES FINANCIAL INC
022 B000006 59-1517485
022 C000006 14771
022 D000006 6573
022 A000007 PERSHING LLC
022 B000007 13-2741729
022 C000007 8040
022 D000007 7866
022 A000008 JP MORGAN SECURITIES LLC
022 B000008 13-4110995
022 C000008 5751
022 D000008 6022
022 A000009 NATIONAL FINANCIAL SERVICES LLC
PAGE 3
022 B000009 04-3523567
022 C000009 8176
022 D000009 3050
022 A000010 GOLDMAN SACHS & CO
022 B000010 13-5108880
022 C000010 6195
022 D000010 2053
023 C000000 329866
023 D000000 228853
024 000000 N
026 A000000 N
026 B000000 N
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 N
028 A010000 0
028 A020000 0
028 A030000 0
028 A040000 0
028 B010000 0
028 B020000 0
028 B030000 0
028 B040000 0
028 C010000 0
028 C020000 0
028 C030000 0
028 C040000 0
028 D010000 0
028 D020000 0
028 D030000 0
028 D040000 0
028 E010000 0
028 E020000 0
028 E030000 0
028 E040000 0
028 F010000 0
028 F020000 0
028 F030000 0
028 F040000 0
028 G010000 0
028 G020000 0
028 G030000 0
028 G040000 0
028 H000000 0
030 A000000 0
030 B000000 0.00
PAGE 4
030 C000000 0.00
031 A000000 0
031 B000000 0
032 000000 0
033 000000 0
035 000000 0
036 B000000 0
038 000000 0
042 A000000 0
042 B000000 0
042 C000000 0
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 0
044 000000 0
045 000000 Y
046 000000 N
047 000000 Y
048 000000 0.500
048 A010000 0
048 A020000 0.000
048 B010000 0
048 B020000 0.000
048 C010000 0
048 C020000 0.000
048 D010000 0
048 D020000 0.000
048 E010000 0
048 E020000 0.000
048 F010000 0
048 F020000 0.000
048 G010000 0
048 G020000 0.000
048 H010000 0
048 H020000 0.000
048 I010000 0
048 I020000 0.000
048 J010000 0
048 J020000 0.000
048 K010000 0
048 K020000 0.000
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 Y
053 B000000 Y
053 C000000 N
PAGE 5
054 A000000 Y
054 B000000 Y
054 C000000 N
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 N
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 N
054 M000000 Y
054 N000000 N
055 A000000 Y
055 B000000 N
056 000000 Y
057 000000 N
058 A000000 N
059 000000 Y
060 A000000 Y
060 B000000 Y
061 000000 0
062 A000000 Y
062 B000000 0.0
062 C000000 0.0
062 D000000 0.0
062 E000000 0.0
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 0.0
062 L000000 2.1
062 M000000 0.0
062 N000000 0.0
062 O000000 161.4
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 0
063 B000000 19.5
064 A000000 Y
064 B000000 N
066 A000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
070 A010000 Y
PAGE 6
070 A020000 N
070 B010000 N
070 B020000 N
070 C010000 Y
070 C020000 N
070 D010000 N
070 D020000 N
070 E010000 Y
070 E020000 Y
070 F010000 N
070 F020000 N
070 G010000 Y
070 G020000 N
070 H010000 N
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 Y
070 J020000 N
070 K010000 Y
070 K020000 Y
070 L010000 N
070 L020000 N
070 M010000 N
070 M020000 N
070 N010000 Y
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 Y
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 169514
071 B000000 163965
071 C000000 1579224
071 D000000 10
072 A000000 6
072 B000000 33807
072 C000000 90
072 D000000 0
072 E000000 0
072 F000000 4032
072 G000000 84
072 H000000 0
072 I000000 37
072 J000000 29
072 K000000 0
072 L000000 8
PAGE 7
072 M000000 57
072 N000000 12
072 O000000 0
072 P000000 5538
072 Q000000 0
072 R000000 35
072 S000000 62
072 T000000 0
072 U000000 0
072 V000000 0
072 W000000 51
072 X000000 9945
072 Y000000 10
072 Z000000 23962
072AA000000 1732
072BB000000 0
072CC010000 0
072CC020000 19419
072DD010000 26857
072DD020000 0
072EE000000 0
073 A010000 0.3941
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 1315
074 B000000 0
074 C000000 0
074 D000000 1559066
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 19886
074 J000000 11681
074 K000000 17
074 L000000 17153
074 M000000 36
074 N000000 1609154
074 O000000 18907
074 P000000 675
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 267670
074 S000000 355933
074 T000000 965969
074 U010000 68151
074 U020000 0
074 V010000 14.17
PAGE 8
074 V020000 0.00
074 W000000 0.0000
074 X000000 23671
074 Y000000 461820
075 A000000 0
075 B000000 981905
076 000000 12.77
077 A000000 Y
077 O000000 Y
078 000000 N
080 C000000 0
081 B000000 0
082 B000000 0
083 B000000 0
084 B000000 0
086 A010000 66
086 A020000 958
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
087 A010000 COMMON STOCK
087 A020000 09254E103
087 A030000 MYI
087 B010000 PREFERRED STOCK
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 Y
SIGNATURE NEAL J. ANDREWS
TITLE CFO