CAPE GIRARDEAU, Mo. — President Trump said on Monday that a meeting with President Vladimir V. Putin of Russia expected to take place this weekend in Paris would be delayed, possibly until later in the month when both are planning to attend an international summit meeting in Buenos Aires.

Mr. Trump sent his national security adviser, John R. Bolton, to Moscow last month to discuss the Paris meeting, but in response to reporters on Monday, the president said the two leaders would probably not sit down with each other until the annual meeting of the leaders of the Group of 20 major nations.

“Well, we haven’t set anything up yet,” Mr. Trump said before leaving Washington for a last day of campaigning in Ohio, Indiana and Missouri before Tuesday’s midterm elections. “We don’t know that that’s going to be the right place. I’m going to be in Paris for other reasons. But we will be meeting at the G-20. And probably we’ll have meetings after that — probably plenty of meetings.”

“Getting along with Russia, China and all of them would be a good thing,” he added. “I’ve said it for a long time. So we’ll have plenty of meetings. But I’m not sure that we’ll have a meeting in Paris — probably not.”