Russia and Iran called the use of force by the United States and its French and British allies a "military crime" and 'act of aggression.' The UN Security Council rejected a Russian resolution calling for condemnation of the aggression by the three Western allies.
Assad also called for aid from Russian Federation, saying rebuilding Syria's infrastructure will cost 400 billion dollars, and will take 10 to 15 years.
Russia's demand for condemnation and an immediate halt to "aggression" and "any further use of force" by the three Western allies got support from only two other countries on the 15-member Security Council - China and Bolivia. Eight countries voted against and four abstained.
The attack, which killed more than 40 civilians, spurred the United States, France and Britain to launch more than 100 missiles at Syria over the weekend.
A joint United Nations-OPCW mission concluded that troops under Syrian President Bashar Assad had used chemical weapons several times in recent years, including in a sarin attack a year ago in the town of Khan Sheikhoun that killed almost 100 people.
Russian Federation had said all along that Syria had no need to use chemical weapons.
U.S. Ambassador Nikki Haley told the council "there is clear information demonstrating Assad's culpability".
Addressing told the council, Haley said the United States was confident that the military strikes had crippled Syria's chemical weapons program.
"When our president draws a red line, our president enforces the red line", Haley stressed.
Speaking before the UN Security Council Saturday, " Pierce, " Britain's female ambassador at the intergovernmental company's background, laid out the details of a diplomatic resolution for the Syrian tragedy, which has been improved together side the US and France. "I think everyone knows that we sent a strong message, and our hope is that they listen to it".
Russian military police had been deployed in Douma, raising complaints from the Syrian opposition that evidence of chemical weapons use might no longer be found. "Now they punish us for the mere fact of being in the global arena". "We're matching", he said. "If we continue on this path, we will soon reach the diplomacy of the absurd".
The war and politics of Syria are broadly going its way.
Britain believes "that is wholly within the principles and practices of the United Nations", she said.
"I can really confirm that the sanctions are to be imposed on Russia without any link to reality", she said on Russian television.
"Sentiment, still, will be tempered awaiting the Kremlin's response to the USA -led strike in Syria, to US sanctions of last week and potential new sanctions".
It seeks answers from Syria on gaps in its chemical weapons declaration to the Organization for the Prohibition of Chemical Weapons.
Russian President Vladimir Putin warned on Sunday that further Western attacks on Syria would bring chaos to world affairs, while signs emerged that Moscow and Washington wanted to pull back from the worst crisis in their relations for years.