$4 NLHE Full Ring: I was about to fold

Merge - $0.04 NL - Holdem - 8 players
Hand converted by PokerTracker 4

BB: 100 BB (VPIP: 0.00, PFR: 0.00, 3Bet Preflop: 0.00, hands: 6)
UTG: 110.25 BB (VPIP: 47.62, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 21)
UTG+1: 70.5 BB (VPIP: 50.00, PFR: 16.67, 3Bet Preflop: 0.00, Hands: 6)
MP: 84.5 BB (VPIP: 15.13, PFR: 0.84, 3Bet Preflop: 0.00, Hands: 120)
Hero (MP+1): 104 BB
CO: 37.25 BB (VPIP: 6.78, PFR: 5.08, 3Bet Preflop: 0.00, Hands: 59)
BTN: 115.75 BB (VPIP: 9.70, PFR: 8.21, 3Bet Preflop: 0.00, Hands: 135)
SB: 89 BB (VPIP: 20.34, PFR: 5.08, 3Bet Preflop: 3.57, Hands: 59)

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has 3♥ A♠

fold, UTG+1 calls 1 BB, fold, Hero calls 1 BB, fold, BTN calls 1 BB, SB calls 0.5 BB, BB checks

Flop: (5 BB, 5 players) 9♥ Q♣ A♣
SB checks, BB checks, UTG+1 checks, Hero bets 3 BB, fold, fold, fold, UTG+1 calls 3 BB

Turn: (11 BB, 2 players) 2♣
UTG+1 checks, Hero bets 5.5 BB, UTG+1 raises to 11 BB, Hero calls 5.5 BB

River: (33 BB, 2 players) A♥
UTG+1 bets 37 BB, Hero calls 37 BB
This was a tricky one and was real close to folding but he was acting like a total donk on the other table he was at and he's known to be a tricky fish if that makes sense lol. So I made the call, although i feel i should have folded here what do you think? What he did on the turn really scared me... Was this a -EV play?

Limping ace-rag in middle position was the first mistake IMO, just fold preflop and avoid the situation.

I think it's worth asking this too: what were you looking to achieve with your flop and turn bets? What kind of hands did you think the villain could have, and what were you hoping he'd do?

I agree with Oz, you shouldn't even be thinking about playing A3o in that position and even on the button I personally would be folding. Also, if you're going to play a hand then make a raise rather than limping in!

You ended up in a sticky situation and imo got lucky, most times you aren't going to get anywhere with A3o.