President Trump dismissed the need on Tuesday to weigh stricter gun control measures in the wake of a shooting at a Texas church on Sunday that left 26 people dead.

"There would have been no difference three days ago, and you might not have had that very brave person who happened to have a gun or a rifle in his truck go out and shoot him and hit him and neutralize him," Trump said when asked about the Sutherland Springs attack.

"I can only say this: If he didn't have a gun, instead of having 26 dead, you would have had hundred more dead. So that's the way I feel about it. Not going to help," Trump added.

Trump was referring to the Sutherland Springs residents who witnessed the shooting at a rural church on Sunday and pursued the shooter's vehicle before he lost control and drove into a field. The man had been shot but also sustained a self-inflicted gun wound.

The president also chided the reporter who asked him about gun policy during the joint press conference in Seoul with South Korean President Moon Jae-in, telling the journalist the question was off topic.

"If you feel that's an appropriate question, even though we're in the heart of South Korea, I will certainly answer your question," Trump said.

As he has done in the past, the president referred to the violence in Chicago that has persisted despite the city's tough gun control laws.

"Chicago is a disaster. It's a total disaster," Trump said.