The day before the strikes Russian President Vladimir Putin warned during phone talks with his French counterpart Emmanuel Macron against "ill-considered and risky actions" in Syria which could lead to "unpredictable consequences".
In London, British Prime Minister Theresa May was facing criticism over her decision to bypass parliament and take part in the air strikes against Syria.
Stepping up the pressure on Syria's President, US Ambassador to the United Nations Nikki Haley indicated the sanctions to be announced Monday would be aimed at companies "that were dealing with equipment" related to Mr Assad's alleged chemical weapons use. The Western trio swiftly reverted to diplomatic efforts, with leaders facing flak at home over the punitive attack.
He said "10 days ago President Trump wanted to withdraw from Syria".
"In the USA administration there are specific people who it is possible to talk with", said Ermakov, head of the ministry's department for non-proliferation and arms control.
Russian Federation in November used its veto three times to bury a previous UN-led inquiry which found that Syrian forces had used sarin in the attack on Khan Sheikhun in April past year.
Regionally, at the Arab League summit over the weekend, the strikes were discussed and Iraq was one of the few countries to condemn them.
"Good souls will not be humiliated", Syria's presidential account tweeted after the airstrikes began.
- Senator Todd Young (@SenToddYoung)Congressman Bucshon supports the President's response to the deadly chemical weapons attack by Assad in Syria that killed innocent men, women and children. On the other hand, USA officials said they are unsure if reconstruction work in the areas will be continued or not. Just hours after the Western strikes, the Syrian military declared it had fully retaken Eastern Ghouta, in a key victory for the resurgent regime, which had launched a blistering two-month assault on the opposition stronghold.
The United Nations Security Council rejected a Russian resolution that would condemn "aggression" by the USA and its allies against Syria on Saturday.
We must remember the context of these attacks.
The bombings, hailed by US President Donald Trump as a success but denounced by Damascus and its allies as an act of aggression, marked the biggest intervention by Western countries against Assad and ally Russian Federation.
In Britain, Prime Minister Theresa May told British lawmakers Monday that Syria, supported by Russian Federation, was trying to hide facts about the attack.
While the generals surrounding Trump had insisted that the United States will have to remain in Syria indefinitely, the president himself declared in March that USA troops will be out "very soon".
The EU insists "there can be no military solution" to the war in Syria, which has killed over 350,000 people, and has repeatedly called for the UN-led talks in Geneva to be given fresh impetus.
In contrast, eight nations voted against Russian Federation - the U.S., Britain, France, Netherlands, Sweden, Kuwait, Poland and Ivory Coast.