EDIT: I can now see the answer is obvious given my opponents' stacks. And that I did the right thing
Poker Stars, $0.01 Buy-in (150/300 blinds, 40 ante) No Limit Hold'em Tournament, 9 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.
SB: 12,396 (41.3 bb)
Hero (BB): 9,030 (30.1 bb)
UTG+1: 10,280 (34.3 bb)
UTG+2: 2,710 (9 bb)
MP1: 7,730 (25.8 bb)
MP2: 7,895 (26.3 bb)
MP3: 162 (0.5 bb)
CO: 4,690 (15.6 bb)
BTN: 6,940 (23.1 bb)
Preflop: Hero is BB with K♥: A♠:
UTG+1 folds, UTG+2 raises to 2,670 and is all-in, 4 folds, BTN raises to 5,040, SB folds, Hero raises to 8,990 and is all-in, BTN calls 1,860 and is all-in
Flop: (16,980) 6♠: 3♠: Q♦: (3 players, 3 are all-in)
Turn: (16,980) 5♣: (3 players, 3 are all-in)
River: (16,980) 9♣: (3 players, 3 are all-in)
Spoiler
Results: 16,980 pot
Final Board: 6♠: 3♠: Q♦: 5♣: 9♣:
Hero showed K♥: A♠: and lost (-6,940 net)
UTG+2 showed K♣: 2♣: and lost (-2,710 net)
BTN showed 4♦: 4♥: and won 16,980 (10,040 net)