PAGE  1
000 B000000 05/31/2011
000 C000000 0001177214
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 NUVEEN MD DIVIDEND ADVANTAGE MUNICIPAL FUND 3
001 B000000 811-21153
001 C000000 3129178200
002 A000000 333 WEST WACKER DRIVE
002 B000000 CHICAGO
002 C000000 IL
002 D010000 60606
002 D020000 1286
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 NUVEEN FUND ADVISORS, INC.
008 B000001 A
008 C000001 801-14147
008 D010001 CHICAGO
008 D020001 IL
008 D030001 60606
008 D040001 1286
008 A000002 NUVEEN ASSET MANAGEMENT, LLC
008 B000002 S
008 C000002 801-71957
008 D010002 CHICAGO
008 D020002 IL
008 D030002 60606
008 D040002 1286
012 A000001 EQUISERVE INC.
012 B000001 84-05925
012 C010001 PROVIDENCE
012 C020001 RI
      PAGE  2
012 C030001 02940
013 A000001 ERNST & YOUNG LLP
013 B010001 CHICAGO
013 B020001 IL
013 B030001 60606
014 A000001 NUVEEN INVESTMENTS, LLC
014 B000001 8-13464
015 A000001 STATE STREET BANK AND TRUST COMPANY
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02110
015 E010001 X
018  000000 Y
019 A000000 Y
019 B000000  245
019 C000000 NUVEENFUND
020 C000001      0
020 C000002      0
020 C000003      0
020 C000004      0
020 C000005      0
020 C000006      0
020 C000007      0
020 C000008      0
020 C000009      0
020 C000010      0
021  000000        0
022 A000001 BARCLAYS BANK PLC
022 B000001 13-4942190
022 C000001      2026
022 D000001         0
022 A000002 GOLDMAN SACHS
022 B000002 13-5108880
022 C000002      1642
022 D000002       102
022 A000003 ZIEGLER SECURITIES
022 B000003 39-0727640
022 C000003      1449
022 D000003         0
022 A000004 CITIGROUP
022 B000004 13-3214963
022 C000004      1204
022 D000004         0
022 A000005 TORONTO-DOMINION
022 B000005 13-5640479
022 C000005         0
022 D000005      1141
022 A000006 JP MORGAN CHASE
022 B000006 13-3224016
022 C000006       794
      PAGE  3
022 D000006         0
022 A000007 RBC DOMINION
022 B000007 13-5033225
022 C000007       701
022 D000007         0
022 A000008 M&T SECURITIES
022 B000008 16-1263079
022 C000008       526
022 D000008         0
022 A000009 RAYMOND JAMES
022 B000009 59-1237041
022 C000009       470
022 D000009         0
022 A000010 MERRILL LYNCH
022 B000010 13-5674085
022 C000010       394
022 D000010         0
023 C000000       9917
023 D000000       1243
024  000000 N
025 D000001       0
025 D000002       0
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
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
      PAGE  4
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
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 N
048  000000  0.000
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
      PAGE  5
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 Y
053 A000000 Y
053 B000000 Y
053 C000000 N
054 A000000 Y
054 B000000 N
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
054 O000000 Y
055 A000000 Y
055 B000000 N
056  000000 Y
057  000000 N
058 A000000 N
059  000000 Y
060 A000000 N
060 B000000 N
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
      PAGE  6
062 J000000   0.0
062 K000000   0.0
062 L000000   0.0
062 M000000   0.0
062 N000000   0.0
062 O000000 152.4
062 P000000   0.0
062 Q000000   0.0
062 R000000   0.0
063 A000000   0
063 B000000 10.9
064 A000000 Y
064 B000000 N
066 A000000 N
067  000000 N
068 A000000 N
068 B000000 N
069  000000 N
070 A010000 Y
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 N
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 N
070 L010000 N
070 L020000 N
070 M010000 N
070 M020000 N
070 N010000 N
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 N
070 P020000 N
070 Q010000 N
      PAGE  7
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000      9917
071 B000000      7888
071 C000000    114347
071 D000000    7
072 A000000 12
072 B000000     5632
072 C000000        0
072 D000000        0
072 E000000        0
072 F000000      727
072 G000000        0
072 H000000        0
072 I000000       40
072 J000000       26
072 K000000        9
072 L000000       18
072 M000000        3
072 N000000        0
072 O000000        0
072 P000000      898
072 Q000000        0
072 R000000       18
072 S000000        3
072 T000000        0
072 U000000        0
072 V000000        0
072 W000000       43
072 X000000     1785
072 Y000000       31
072 Z000000     3878
072AA000000      140
072BB000000        0
072CC010000        0
072CC020000     2517
072DD010000     4056
072DD020000        0
072EE000000        0
073 A010000   0.7560
073 A020000   0.0000
073 B000000   0.0000
073 C000000   0.0000
074 A000000      146
074 B000000        0
074 C000000        0
074 D000000   115396
074 E000000        0
074 F000000        0
074 G000000        0
      PAGE  8
074 H000000        0
074 I000000        0
074 J000000       55
074 K000000        0
074 L000000     1999
074 M000000      940
074 N000000   118536
074 O000000        0
074 P000000       62
074 Q000000        0
074 R010000        0
074 R020000        0
074 R030000        0
074 R040000     5010
074 S000000    37766
074 T000000    75698
074 U010000     5366
074 U020000        0
074 V010000    14.11
074 V020000     0.00
074 W000000   0.0000
074 X000000       31
074 Y000000   107839
075 A000000        0
075 B000000    76646
076  000000    13.64
077 A000000 Y
077 B000000 Y
077 Q010000 Y
078  000000 N
080 A000000 CHUBB GROUP OF INSURANCE COMPANIES
080 B000000 BERKLEY, GREAT AMERICAN, ST.PAUL,CNA & ZURICH
080 C000000   110000
081 A000000 Y
081 B000000 244
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      0
086 A020000      0
086 B010000      2
086 B020000     31
086 C010000   1707
086 C020000  17066
086 D010000      1
086 D020000  14825
      PAGE  9
086 E010000      0
086 E020000      0
086 F010000      0
086 F020000      0
087 A010000 COMMON STOCK
087 A020000 67072A109
087 A030000 NWI
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 Y
SIGNATURE   STEPHEN D. FOY
TITLE       V.P & CONTROLLER