The White House said Sunday it would “make sure” the Syrian regime complies with an accord to give up its chemical arsenal, insisting the deal can still be salvaged despite implementation delays and missed deadlines.

“It’s not falling apart, but we would like to see it proceed much more quickly than it is,” White House Chief of Staff Denis McDonough told CBS’s “Face the Nation.”

Mr. McDonough said the U.S. isn’t dependent on Russia to bring Syrian President Bashar al-Assad’s regime into compliance. Moscow is the regime’s main arms supplier and key international backer.

“We’re going to make sure that the Syrians live up to their obligations. They have an obligation to the international community to do exactly what they said they’d do,” Mr. McDonough said.