MANILA — The United States said on Thursday that it had deferred giving economic aid to the Philippines because of concerns about the rule of law as the brutal campaign on drugs under President Rodrigo Duterte appears to show no signs of slowing down.

The United States Embassy in the Philippines said that the deferral did not preclude the country from receiving grants in the future.

The decision reflected “significant concerns around the rule of law and civil liberties in the Philippines,” said Molly Koscina, a spokeswoman for the embassy.

The Millennium Challenge Corporation, set up by the United States government to reduce poverty around the world, said in a statement on Wednesday that it had deferred a vote on renewing the funding. Neither government indicated the size of the grant, but officials said the figure was lower than the previous aid package, worth about $434 million.