correct fold

intersting spot with pockets queens facing a four bet, i elected to fold as the player from my observation was playing fairly tight, since i 3 bet is it correct for me to fold to a 4 bet shove knowing i am most probably beat, or am i pot comited at this stage.

PokerStars Hand #128506227735: Tournament #1103984652, $1.00+$0.10 USD Hold'em No Limit - Level V (75/150) - 2015/01/12 21:10:45 CCT [2015/01/12 8:10:45 ET]
Table '1103984652 75' 9-max Seat #3 is the button
Seat 1: 1sanchous (3375 in chips)
Seat 2: erwinjo46 (10761 in chips)
Seat 3: daniel.bin69 (9124 in chips)
Seat 4: jucatoru73 (3026 in chips)
Seat 5: Magistr1983 (9108 in chips)
Seat 6: Marc1013 (4600 in chips)
Seat 7: DJ LULA UK (2548 in chips)
Seat 8: JhonyBrown (4854 in chips)
Seat 9: iangeo (14264 in chips)
jucatoru73: posts small blind 75
Magistr1983: posts big blind 150
*** HOLE CARDS ***
Dealt to daniel.bin69 [Qh Qd]
Marc1013: folds
DJ LULA UK: folds
JhonyBrown: folds
iangeo: calls 150
1sanchous: folds
erwinjo46: raises 150 to 300
daniel.bin69: raises 750 to 1050
jucatoru73: folds
Magistr1983: folds
iangeo: calls 900
erwinjo46: raises 9711 to 10761 and is all-in
daniel.bin69: folds
iangeo: folds
Uncalled bet (9711) returned to erwinjo46
erwinjo46 collected 3375 from pot
erwinjo46: doesn't show hand
*** SUMMARY ***
Total pot 3375 | Rake 0
Seat 1: 1sanchous folded before Flop (didn't bet)
Seat 2: erwinjo46 collected (3375)
Seat 3: daniel.bin69 (button) folded before Flop
Seat 4: jucatoru73 (small blind) folded before Flop
Seat 5: Magistr1983 (big blind) folded before Flop
Seat 6: Marc1013 folded before Flop (didn't bet)
Seat 7: DJ LULA UK folded before Flop (didn't bet)
Seat 8: JhonyBrown folded before Flop (didn't bet)
Seat 9: iangeo folded before Flop