With the rest of the world on tenterhooks ever since, Trump has said he will make his decision before the next G7 meeting on May 26-27 in Sicily.
Spicer said Trump wants to "continue to meet with his team", seeking advice from both an economic and an environmental perspective as he works to make a decision.
Trump vowed during his presidential campaign to "cancel" USA participation in the accord, which obliges countries to slash their greenhouse gas emissions to keep global temperatures from rising to catastrophic levels.
The leaders of all of the other G-7 members - Canada, France, Germany, Italy, Japan and the European Union - strongly support the agreement, and many have been pushing Trump publicly and privately to stay in it.
The gathering of top aides was delayed because of scheduling conflicts, the White House said late Monday.
"We urge all nations to stand by their commitments to the agreement", it said. It did not say when the meeting would be held.
Climate change "is a very important and sensitive issue for the French".
"There's no question that if the United States withdraws it is going to create difficulties.in the negotiations", Paula Caballero of the World Resources Institute think-tank said as climate envoys met for their first session since Trump took office.
But speculation has increased that President Donald Trump may withdraw America over fears it could hamper his oil and gas reforms.
President Trump has threatened to pull the plug on US involvement of the Paris Agreement ahead of the G7 Summit in Italy later this month, spurring major companies to speak out in support of continued climate change efforts.
Insisting that the USA remain engaged and lead action when it comes to taking on climate change, the ad implores the Trump White House to "best exercise global leadership and advance US interests by remaining a full partner in this vital global effort".
Trump's advisers have warned of legal problems if Washington stays in the Paris deal but waters down former president Barack Obama's goal of deep cuts in emissions by 2025.
The Peoples Climate Movement will be sending a message to the Administration negating the assertion that the Paris Agreement will hurt our families, communities and planet.
"Investors are sending a powerful signal today that climate change action must be an urgent priority in the G20 countries, especially the United States, whose commitment is in question", said Mindy Lubber, from the Ceres Investor Network on Climate Risk and Sustainability.
The US has sent just seven officials - three fewer than the small Central American state of Belize.