"This fully applies to any potential agreements in the nuclear missile sphere," Xinhua quoted the Russian foreign ministry as saying.
The new START or Strategic Arms Reduction Treaty was signed between Moscow and Washington in 2010 and came into force in 2011.
It is a nuclear arms reduction treaty, which replaced the Treaty of Moscow.
It established a new inspection and verification regime, replacing the previous mechanism, along with reducing the number of strategic nuclear missile launchers by half in both the United States and Russia.
Moscow outlined that the extension of the treaty would be in the interest of the entire world community and that the nation is interested in avoiding a new missile crisis in Europe and other regions.
The US and Russia recently walked out of the Cold War-era Intermediate-Range Nuclear Forces Treaty, setting off fears of a new arms race between the two countries.