Stuart Armstrong went down late in the second half after a challenge from Hungary defender Willi Orban, but Argentine referee Facundo Tello did not intervene.

"It was 100 percent a penalty. Someone has to explain to me why it wasn't a penalty because otherwise I'm thinking there's something wrong," said Clarke.

"I don't understand how VAR can look at that and say it's not a penalty."

Kevin Csoboth struck in the 10th minute of stoppage time after a horror injury to Barnabas Varga, sealing Scotland's elimination after they finished bottom of Group A with just a single point.

"It was always a one-goal game," said Clarke. "We didn't manage to get the goal, we opened up at the end to try and get it.

"The overriding feeling is to be sad for everybody, for the supporters and the country and the players are just as sad as everyone else."