Garcia, who swapped Maccabi Tel Aviv for Sussex over the summer, saw his side lose to a goal which appeared to strike Luke Murphy's hand before the midfielder put the ball in the net.
"I couldn't see it, everybody said yes, it was handball, but to be a referee is very difficult and I can understand if he did not see a handball," Garcia said.
"It is more disappointing when we had a chance to score five minutes before.
"Leeds are a physical team and more so when they play at home so we knew it would be tough. We had our chances and did not take them, so we got this result."
Unlike his often-emotional predecessor, Gus Poyet, the former Barcelona midfielder was relatively sedate throughout the game, even though his men let Leonardo Ulloa's goal mean nothing as Ross McCormack and then Murphy scored.
He indicated he does have a harsher side, though, saying: "Tomorrow the players will know what I think of the performance. I am only happy when we play 100 per cent."
- Sports & Recreation
- Luke Murphy