The White House originally said that Trump hoped to decide by the meeting - held in Sicily in late May - whether to pull the US from the landmark climate pact.
A meeting of his advisers that had been scheduled for Tuesday was postponed due to scheduling conflicts, a White House Official said. Reports suggest Ivanka Trump will chair the meeting. But it was postponed.
"Remaining in the Paris Climate Treaty would undermine the Trump administration's efforts to protect American families from unnecessary and burdensome climate regulations", said Thomas Pyle, president of the American Energy Alliance, who served on Trump's transition team. It did not say when the meeting would be held.
The Chinese leader's comments on Tuesday came as climate negotiators entered their second day of meetings in Bonn, Germany, aiming to start drafting a guide on how to implement the landmark deal amid fears the United States may pull out of it.
What: The Peoples Climate Movement will flood the lobby of Trump Hotel early in the morning with a massive wake-up call to the president. But the gathering risks being hamstrung over fears that the United States, the world's number two carbon polluter, will pull out and throw the agreement into disarray.
Regardless of whether or not the USA leaves the Paris agreement, American climate scientists who doubt their work will find traction on this side of the Atlantic have an ally on the continent.More news: England racks up 328-6 vs Ireland in 2nd ODI
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No new date was given for the session, which aims to bring together President Donald Trump - who is flirting with pulling out of the agreement - with top climate and economic advisers.
Obama set targets to reduce emissions by 26-28 percent below 2005 levels by 2025.
"Climate change poses strategically significant risks to US national security, directly impacting our critical infrastructure and increasing the likelihood of humanitarian disasters, state failure and conflict", former officers and security officials wrote in the letter to Tillerson.
One option said to be under consideration is full withdrawal, which would fulfill Trump's campaign promise to "cancel" the deal as president.
Be Civil - It's OK to have a difference in opinion but there's no need to be a jerk. She added that climate change "is a very important and sensitive issue for the French" and Macron said "he will protect what was made in Paris".
The Trump administration has already proposed slashing funds for the United Nations climate science panel, for the Green Climate Fund that helps poor countries combat global warming, and for the United Nations climate forum under whose auspices the negotiations take place.