President Vladimir Putin has signed a decree to withdraw Russia from the International Criminal Court, which rules on charges such as genocide and crimes against humanity.
Mr Putin's decree, published on the Kremlin's website, comes a day after the UN General Assembly's human rights committee approved a resolution condemning Russia's "temporary occupation of Crimea" and condemned Russia for rights abuses such as discrimination against some Crimeans.
Russia annexed Crimea in March 2014 from Ukraine following a hastily called referendum, a move that led to crippling Western sanctions.
A pro-Russia insurgency erupted in eastern Ukraine the following month, backed by Russia.
Mr Putin in 2000 signed the Rome treaty that established the Hague-based court, but never ratified it.