PAGE  1
000 B000000 02/28/2010
000 C000000 0001049549
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 BLK CORPORATE HIGH YIELD FUND III, INC.
001 B000000 811-08497
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
007 C010200  2
007 C010300  3
007 C010400  4
007 C010500  5
007 C010600  6
007 C010700  7
007 C010800  8
007 C010900  9
007 C011000 10
008 A000001 BLACKROCK ADVISORS, LLC
008 B000001 A
008 C000001 801-47710
008 D010001 WILMINGTON
008 D020001 DE
008 D030001 19809
008 A000002 BLACKROCK FINANCIAL MANAGEMENT, INC.
008 B000002 S
008 C000002 801-48433
008 D010002 NEW YORK
008 D020002 NY
008 D030002 10055
012 A000001 COMPUTERSHARE TRUST COMPANY, N.A.
012 B000001 85-11340
012 C010001 PROVIDENCE
012 C020001 RI
012 C030001 02940
013 A000001 DELOITTE & TOUCHE LLP
013 B010001 PRINCETON
      PAGE  2
013 B020001 NJ
013 B030001 08540
014 A000001 BB & T AM DISTRIBUTORS, INC.
014 B000001 8-52396
014 A000002 BLACKROCK CAPITAL MARKETS, LLC
014 B000002 8-67827
014 A000003 BLACKROCK DISTRIBUTORS, INC.
014 B000003 8-48775
014 A000004 BLACKROCK INVESTMENTS, LLC
014 B000004 8-48436
014 A000005 HARRIS WILLIAMS LLC
014 B000005 8-53380
014 A000006 MGI FUNDS DISTRIBUTOR, INC.
014 B000006 8-46960
014 A000007 NATCITY INVESTMENTS, INC.
014 B000007 8-35288
014 A000008 NORTHERN FUNDS DISTRIBUTORS, LLC
014 B000008 8-51242
014 A000009 PNC CAPITAL MARKETS, INC.
014 B000009 8-32493
014 A000010 PNC INVESTMENTS LLC
014 B000010 8-66195
014 A000011 PFPC DISTRIBUTORS, INC.
014 B000011 8-45467
014 A000012 RED CAPITAL MARKETS, INC.
014 B000012 8-31175
014 A000013 BLACKROCK EXECUTION SERVICES
014 B000013 8-48719
014 A000014 BLACKROCK FUND DISTRIBUTION COMPANY
014 B000014 8-67795
015 A000001 STATE STREET BANK AND TRUST COMPANY
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02111
015 E010001 X
015 A000002 THE BANK OF NEW YORK MELLON
015 B000002 S
015 C010002 NEW YORK
015 C020002 NY
015 C030002 10286
015 E010002 X
015 A000003 J.P. MORGAN CHASE BANK
015 B000003 S
015 C010003 NEW YORK
015 C020003 NY
015 C030003 10017
015 E010003 X
015 A000004 STATE STREET TRUST COMPANY CANADA
015 B000004 S
015 C010004 CANADA
      PAGE  3
015 D010004 CANADA
015 E040004 X
015 A000005 BANK OF IRELAND
015 B000005 S
015 C010005 IRELAND
015 D010005 IRELAND
015 E040005 X
015 A000006 STATE STREET BANK AND TRUST
015 B000006 S
015 C010006 UNITED KINGDOM
015 D010006 UNITED KINGDOM
015 E010006 X
018  000000 Y
019 A000000 Y
019 B000000  282
019 C000000 BLKRKADVSR
020 A000001 JONESTRADING INSTITUTIONAL SERVICES LLC
020 B000001 51-0484896
020 C000001     41
020 A000002 BEDROK SECURITIES LLC
020 C000002     19
020 A000003 KNIGHT LIBERTAS LLC
020 C000003      2
020 A000004 RAFFERTY CAPITAL MARKETS, LLC
020 C000004      1
020 A000005 CREDIT SUISSE SECURITIES (USA) L.L.C.
020 B000005 13-5659485
020 C000005      1
020 A000006 GOLDMAN, SACHS & CO.
020 B000006 13-5108880
020 C000006      1
020 A000007 MORGAN STANLEY & CO. INCORPORATED
020 B000007 13-2655998
020 C000007      1
020 A000008 JEFFERIES & COMPANY, INC.
020 B000008 95-2622900
020 C000008      1
020 A000009 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
020 B000009 13-5674085
020 C000009      0
020 A000010 CITIGROUP GLOBAL MARKETS, INC.
020 B000010 11-2418191
020 C000010      0
021  000000       67
022 A000001 BLK LIQUIDITY FUNDS, TEMPFUND, INSTIT. CLASS
022 B000001 52-0983343
022 C000001     98297
022 D000001     95396
022 A000002 CREDIT SUISSE SECURITIES (USA) L.L.C.
022 B000002 13-5659485
022 C000002     38280
      PAGE  4
022 D000002     26815
022 A000003 J.P. MORGAN SECURITIES INC.
022 B000003 13-3299429
022 C000003     43407
022 D000003     15265
022 A000004 MORGAN STANLEY & CO. INCORPORATED
022 B000004 13-2655998
022 C000004     18511
022 D000004     20374
022 A000005 CITIGROUP GLOBAL MARKETS, INC.
022 B000005 11-2418191
022 C000005     20705
022 D000005     16752
022 A000006 GOLDMAN, SACHS & CO.
022 B000006 13-5108880
022 C000006     25468
022 D000006      6918
022 A000007 BARCLAYS CAPITAL INC.
022 C000007     16738
022 D000007     14266
022 A000008 DEUTSCHE BANK SECURITIES INC.
022 B000008 13-2730828
022 C000008     17870
022 D000008     12675
022 A000009 BANC OF AMERICA SECURITIES LLC
022 B000009 56-2058405
022 C000009     12886
022 D000009     13545
022 A000010 BLK LIQUIDITY SERIES, LLC CASH SWEEP SERIES
022 B000010 02-0651665
022 C000010      4446
022 D000010     12812
023 C000000     328686
023 D000000     291575
024  000000 Y
025 A000001 CITIGROUP, INC.
025 C000001 E
025 D000001    1791
025 A000002 BANC OF AMERICA CORP.
025 C000002 E
025 D000002    1083
025 D000003       0
025 D000004       0
025 D000005       0
025 D000006       0
025 D000007       0
025 D000008       0
026 A000000 N
026 B000000 N
026 C000000 N
026 D000000 Y
      PAGE  5
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027  000000 N
045  000000 Y
046  000000 N
047  000000 Y
048  000000  0.600
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
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
      PAGE  6
054 M000000 Y
054 N000000 N
055 A000000 Y
055 B000000 Y
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   1.3
062 M000000   0.0
062 N000000   0.0
062 O000000   0.0
062 P000000 101.4
062 Q000000  16.6
062 R000000   7.5
063 A000000   0
063 B000000  5.8
064 A000000 N
064 B000000 Y
065  000000 N
066 A000000 N
067  000000 N
068 A000000 N
068 B000000 N
069  000000 N
070 A010000 Y
070 A020000 N
070 B010000 Y
070 B020000 N
070 C010000 Y
070 C020000 Y
070 D010000 N
070 D020000 N
070 E010000 Y
070 E020000 N
070 F010000 N
070 F020000 N
      PAGE  7
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 Y
070 L020000 Y
070 M010000 Y
070 M020000 Y
070 N010000 Y
070 N020000 N
070 O010000 Y
070 O020000 Y
070 P010000 Y
070 P020000 Y
070 Q010000 N
070 Q020000 N
070 R010000 Y
070 R020000 N
071 A000000    254846
071 B000000    228525
071 C000000    255528
071 D000000   89
072 A000000 12
072 B000000    26210
072 C000000       65
072 D000000        0
072 E000000      364
072 F000000     1555
072 G000000       59
072 H000000        0
072 I000000       41
072 J000000       30
072 K000000        0
072 L000000       21
072 M000000       27
072 N000000       13
072 O000000        0
072 P000000      609
072 Q000000        0
072 R000000       50
072 S000000       64
072 T000000        0
072 U000000        0
072 V000000        0
072 W000000      335
      PAGE  8
072 X000000     2804
072 Y000000        2
072 Z000000    23837
072AA000000    17469
072BB000000    33537
072CC010000   115769
072CC020000        0
072DD010000    25190
072DD020000        0
072EE000000        0
073 A010000   0.6750
073 A020000   0.0000
073 B000000   0.0000
073 C000000   0.0000
074 A000000     1011
074 B000000        0
074 C000000        0
074 D000000   294794
074 E000000     2448
074 F000000    11391
074 G000000        0
074 H000000        0
074 I000000     9448
074 J000000    11257
074 K000000        0
074 L000000     5790
074 M000000      412
074 N000000   336551
074 O000000     8476
074 P000000      149
074 Q000000    76000
074 R010000        0
074 R020000        0
074 R030000        0
074 R040000     2205
074 S000000        0
074 T000000   249721
074 U010000    37333
074 U020000        0
074 V010000     6.69
074 V020000     0.00
074 W000000   0.0000
074 X000000    16307
074 Y000000    29392
075 A000000        0
075 B000000   210625
076  000000     6.67
077 A000000 Y
077 B000000 Y
078  000000 N
080 A000000 VIGILANT INSURANCE COMPANY
      PAGE  9
080 B000000 NATIONAL UNION FIRE INSURANCE COMPANY
080 C000000    85000
081 A000000 Y
081 B000000 101
082 A000000 N
082 B000000        0
083 A000000 N
083 B000000        0
084 A000000 N
084 B000000        0
085 A000000 Y
085 B000000 N
086 A010000     17
086 A020000    111
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 09255M104
087 A030000 CYE
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 N
SIGNATURE   NEAL J. ANDREWS
TITLE       CFO