"It's time for (Russian President) Vladimir Putin to face the truth about the tyrant he is propping up", Johnson said, according to a foreign ministry spokeswoman.
US Secretary of State Rex Tillerson blames Russia's inaction for helping fuel a deadly poison attack against Syrian civilians last week.
On Friday, the U.S. carried out missile strikes on a Syrian air base it says is suspected of storing chemical weapons. "He is poisoning the innocent people of Syria with weapons that were banned 100 years ago - and he is poisoning the reputation of Russian Federation", he said.
The Indian-origin diplomat's remarks came days after the United States on 6 April unleashed 59 Tomahawk missiles at a Syrian airbase in a retaliating for the Assad-led government's alleged chemical weapons attack that killed almost 80 persons in Idlib province.
Russian President Vladimir Putin and Iran's Hassan Rouhani said in a phone call that aggressive US actions against Syria were not permissible and violated worldwide law, the Kremlin said. "What happens depends on how everyone responds to what happened in Syria, and make sure that we start moving towards a political solution, and we start finding peace in that area".
The US and United Kingdom have blamed Russia for being complicit in the horrific deaths of innocent Syrians in last week's chemical attack and the federation is facing the threat of fresh global sanctions over its support for the dictator.
U.S. officials said the presence of Russian advisers at the airfield used to launch the attack raised questions about how they could not have known.
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The base is the purported takeoff spot for the chemical attack Tuesday in the northern Syrian town of Khan Sheikhoun, a stronghold for forces trying to overthrow the regime of Syrian President Bashar Assad in a 6-year-long civil war.
It is also closing down a hotline with the United States created to avoid collisions between their air forces over Syria.
"The failure related to the recent strike and the recent bad chemical weapons attack in large measure is a failure on Russia's part to achieve its commitment to the worldwide community".
Lawmakers say President Donald Trump needs to work with Congress on a "long-term" Syria strategy following last week's US missile strike.
Syria has been gripped by civil war since March 2011 with various terrorist groups, including Daesh (also known as ISIS or ISIL), now controlling parts of it.
"Assad choked out the lives of helpless men, women and children", Trump said.
It marked a major departure from the criticism of U.S. military intervention and apparent support for Russia's role in Syria that Mr Trump voiced during his election campaign.
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