Putin asked, warning that the modern world has grown accustomed to underestimating the threat of nuclear war despite growing risks of nuclear exchanges.
Putin said Russian Federation will be forced to respond to any intermediate-range missile deployments in Europe with deployments of its own. He added that Russian Federation has not yet observed signs of an American withdrawal from Syria.
Speaking at an annual news conference in Moscow, Mr Putin said: "She must enact the will of the people, expressed during the referendum". As Putin was speaking, Trump tweeted that Russia was among those countries that are "not happy about the US leaving" because they will have to fight Islamic State alone, but the Russian president didn't address that.
US President Donald Trump, in October this year, had announced the US' decision to withdraw from the nuclear treaty.
Vehicles and structures of the US -backed coalition forces are shown May 8, 2018, in the northern Syrian town of Manbij.
Pointing at the United States intention to withdraw from the 1987 Intermediate-Range Nuclear Forces, or INF, Treaty, Putin warned that if the USA puts intermediate-range missiles in Europe, Russia will be forced to take countermeasures. Russian Federation insists it is complying with the deal.
"For humanity in general this is a bad thing, because it leads us to a very risky verge, there is a trend to lower this threshold of actually using those weapons".
The Russian leader pledged that Russia will continue to support Butina.
"Imagine a submarine firing a ballistic missile: How on Earth should we figure out whether it's nuclear or not?" he said. Putin has rejected the US claim that Russian Federation violated the 1987 Intermediate-Range Nuclear Forces Treaty by developing a new cruise missile.
But the Russian president welcomed US President Donald Trump's decision to withdraw the US military from Syria, saying the country "has done the right thing".
"I am convinced - and Prime Minister (Shinzo) Abe agrees - the current situation is not normal". "This shows a lack of respect for voters".
Putin on Tuesday denied his country was in violation of the agreement, but said it had developed powerful airborne and sea-based cruise missiles and could easily roll out land-based missiles if Washington walked away from the pact.
Putin, who was addressing more than 1,000 reporters from around the world, many of them holding up signs to attract his attention, faced a tougher task defending his domestic record.
Russia's economy registered a 1.5% growth last year following the two-year stagnation.
As he began his opening remarks, the price of oil - Russia's biggest export earner - fell, with Brent crude dropping below $55 a barrel for the first time since 2017.
Trump said on Wednesday that the United States had defeated the radical Islamist militant group in Syria, and that this fulfilled the only goal for keeping U.S. troops in the country. "Without it there will be no future for the country".