Russian President Vladimir Putin signed a bill on Monday to pull his country out of a treaty that allows members to conduct surveillance flights over each other's territory.
This comes after the United States withdrew last year from the Treaty on Open Skies, which took effect in 2002 with more than 30 signatories, including Russia and European nations.
Washington accused Moscow of imposing restrictions on observation flights.
US-Russia relations are said to be at their lowest since the end of the Cold War. In 2019, the Intermediate-Range Nuclear Forces Treaty -- a nuclear arms control treaty between the US and Russia -- expired.
Amid concerns about the effects of deteriorating ties on global security, attention is now on the summit between Putin and his US counterpart, Joe Biden, scheduled for Wednesday next week in Switzerland.