US President Donald Trump said his early departure from the G7 summit in Canada on Monday had "nothing to do" with working on ceasefire between Israel and Iran, adding France's leader, Emmanuel Macron, was "wrong" in how he described the exit.

"Publicity seeking President Emmanuel Macron, of France, mistakenly said that I left the G7 Summit, in Canada, to go back to D.C. to work on a 'cease fire' between Israel and Iran," Trump wrote on his Truth Social platform.

"Wrong! He has no idea why I am now on my way to Washington, but it certainly has nothing to do with a Cease Fire. Much bigger than that. Whether purposely or not, Emmanuel always gets it wrong. Stay Tuned!"

World leaders had gathered in Canada with the aim of addressing several pressing global issues. However, the summit was quickly overshadowed by the deepening Middle East crisis, with Israel's aerial bombardment campaign against Iran entering its fourth consecutive day.

At the summit, President Trump warned Iran that it must rein in its nuclear programme before it is “too late.” He claimed Iranian leaders were now willing to talk but had missed their chance to reach an agreement during a 60-day window prior to the Israeli strikes. “They have to make a deal,” he told reporters.

When asked whether the United States would become directly involved in the conflict, Trump replied cryptically: “I don’t want to talk about that.”

In a dramatic post on his social media platform Truth Social, the President declared: “Everyone should immediately evacuate Tehran!” The warning, issued around 2am Tehran time, was followed by news of explosions and heavy anti-aircraft fire reported by Iranian media.