These are 1EUR, 2EUR blinds which is little bit higher than 05$ 1$, but okay..  (kidding)

I don't know why you called turn card and then folded total brick on river...?

Is it just because of bet sizes or you called turn hoping you'll hit FH on river?

Would SB 3-bet you pre with QQ,KK,AA hands?

What do you think villain had in this hand and is there any chance he was drawing to diamonds or to str8?

The board is dry which means there is no possible straight , no flush, board is paired and villain has either 4 or he value bets his AJ. It's little bit strange 10EUR bet on turn as board is pretty drawy and I would bet more my 4 there for more value as well for protection...

ps your hand is not great pre, but as you are in CO, it's like 50-50% to play it or not 4-way... Even less..

I think wp.  I'd fold the turn to any reasonably sized bet, but 10 into 45 is just very small.  Some weird players bluff small on turn and either give up or bluff small again on the river.  But against a bigger turn bet I think you can fold.  Same on the river.  You can consider calling if you know villain likes to pot lead flops with draws.  It's not unreasonable to assume that he does since you're blocking top set and two pair hands, but still, opponent tendencies would matter more here.  The main issue is that he may very well be leading overpair+fd, and he should certainly be value betting that on the river.