[The final day of the Group of 7 meeting in France ended in whiplash for global leaders and swerves toward diplomacy with China and Iran for President Trump.]

President Trump said on Monday that he would be open to meeting with President Hassan Rouhani of Iran, and would even be willing to support short-term loans to get Tehran through its current financial difficulties if talks open.

Mr. Trump was responding to an overture by President Emmanuel Macron of France, who said that he would try to set up such a meeting in the next few weeks, to seek a resolution of decades of conflict between Iran and the United States.

Mr. Macron, who said he had spoken with Mr. Rouhani, said that if the American and Iranian presidents met, “my conviction was that an agreement can be met,” addressing Iran’s nuclear ambitions and its destabilizing actions in the Middle East.