But in a wide ranging interview with French network TF1 Thursday, reported by Le Monde, Macron stated "we have proof that last week, chemical weapons were used - at least chlorine - by Bashar al-Assad's regime".
French President Emmanuel Macron says his country has evidence that Syria attacked the town of Douma with chemical weapons last weekend. Mr Trump rowed back on that threat on Thursday, however, tweeting "Never said when an attack on Syria would take place".
"We will need to take decisions in due course, when we judge it most useful and effective", Macron said.
Regarding a possible escalation of military operations in the region, the French president declared that France's "priority is to work on the stability of the region".
However, he added, France could not give "regimes who think they can do anything" free rein to violate worldwide laws and the global ban on the use of chemical weapons.
President Trump has sent mixed messages on the US response, warning Russian Federation in a tweet Wednesday to "get ready" for USA missile strikes in Syria in retaliation for the attack.
The West has accused Syria of attacking the town but Russian Federation insists the government of Bashar al-Assad did not do it. In his latest tweet, he wrote that an attack on Syria could come very soon or not so soon at all.
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The French president, who said he was in daily contact with President Trump, said any strikes would go after Syria's "chemical capabilities".
She said she spoke on Thursday with Mr Macron.
It was the first public acknowledgement by Jaish al-Islam of a deal reached for Douma, their last rebel holdout in the Eastern Ghouta suburb of Damascus.
The Syrian government has denied the allegations.
The attack on the town of Douma on April 7 killed dozens of people, including children.
"If there is a chemical weapons attack - there must be a reaction from the worldwide community".