NEW YORK — As captured on video, French President Emmanuel Macron on Tuesday prodded Iranian President Hassan Rouhani to meet US President Donald Trump, warning that missing the chance to talk to Trump before he left New York would be a “lost opportunity.”

“If he leaves the country without meeting with President Trump, this is a lost opportunity,” Macron said in a huddle with British Prime Minister Boris Johnson and Rouhani, surrounded by advisers and journalists on the sidelines of the UN on Tuesday. “Because he will not come back in a few months. And President Trump will not go to Tehran, so they have to meet now.”

“You need to be on the side of the swimming pool and jump at the same time,” the UK’s Johnson joined in the effort to sway the Iranian president.

But though Rouhani appeared to smile with amusement throughout the encounter, he apparently resisted the tag-team prodding to get wet, despite the entreaties from the French leader, who has personally spent countless hours on the phone with him and Trump in recent weeks trying to find a formula to reduce tensions and restart talks.