WASHINGTON — The Pentagon announced on Monday that it was suspending a major military exercise with South Korea that President Trump had criticized as a waste of money.

The decision to cancel — at least for now — the large-scale, long-planned Ulchi Freedom Guardian exercise set for August had been expected after Mr. Trump’s surprise announcement in Singapore that he was ending joint military exercises as an inducement for North Korea to dismantle its nuclear weapons program.

“Consistent with President Trump’s commitment and in concert with our Republic of Korea ally, the United States military has suspended all planning for this August’s defensive ‘war game,’” the Pentagon spokeswoman, Dana W. White, said in a statement released on Monday night.

“We are still coordinating additional actions,” Ms. White added. “No decisions on subsequent war games have been made.”