The three Western permanent members on the United Nations Security Council agreed to seek a strong resolution in that forum, which sets binding deadlines for the removal of Syria's chemical weapons, French President Francois Hollande's office said.
The statement followed talks in Paris, two days after the United States reached a deal with Assad's ally Russia on chemical weapons that could avert US strikes on Syria.
US Secretary of State John Kerry told a news conference in Paris that the three powers agreed with Moscow that Assad must suffer consequences if he fails to comply with UN demands.

The accord offered the Syrian leader ‘no lifeline’ and he had ‘lost all legitimacy,’ Kerry added.
After Hollande met Kerry and British Foreign Secretary William Hague and their French counterpart Laurent Fabius, an aide to Hollande said, "The idea is to stick to a firm line."
"They've agreed to seek a strong and robust resolution that sets precise and binding deadlines with a calendar," said the official, who spoke on the condition of anonymity.
Syria's government at the weekend hailed as a ‘victory’ the Russian-brokered deal, which rebels who have been fighting to overthrow the government in Damascus since 2011 says has benefited their enemy in the civil war.
Assad briefly dispersed his forces to protect them from strikes threatened by the United States as punishment for a chemical weapons attack in Damascus on August 21, which Washington says has killed more than 1,400 people, with many of them being children.
Government jets and artillery hit rebel suburbs of the capital again on Sunday in an offensive that residents said have began last week, when President Barack Obama delayed air strikes in the face of opposition from Moscow and in the US Congress.
The deal reached in Geneva has put off the immediate threat of air strikes but Obama has stressed that force remains an option if Assad reneges and US forces remain in position. Russia still opposes military action but now backs possible UN sanctions for non-compliance.


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