Visas to Montenegro:
There are no restrictions on entry into the country for Russians, without a visa, you can stay in Montenegro for up to 30 days only with a foreign passport.
Transit is allowed without restrictions without leaving the transit zone.
Montenegro has banned flights of Russian aircraft over its territory, flights from Russia have been canceled. You can enter the country through Turkey, the UAE or other countries.
At the moment, no special medical documents are required when entering Montenegro, but a Certificate of vaccination with Sputnik-V (if available) will not hurt.