From December 3, you can enter Montenegro only upon presentation of the established documents 
for vaccinated travelers. This was reported by the Russian Embassy in the republic on its Facebook page.
So, from December 3, foreign tourists can enter the country only upon presentation of one of the four established documents to choose from: a certificate of vaccination against COVID-19 (with taking the last component of the vaccine should pass no more than six months), a negative result of a PCR test made no earlier than 72 hours before arrival, a positive result of a coronavirus test that was conducted more than ten days ago, but no later than six months from the date of receipt result, or a certificate with the result of a rapid antigen test made 48 hours before entering Montenegro.
Children under 18 years of age and persons who provide evidence of the impossibility of vaccination for medical reasons ( medical withdrawal).
It is noted that the tightening of the rules of entry for foreigners will be in effect until at least December 22.
Earlier in December, the Cypriot authorities spearheaded the tightening of entry rules for foreign travelers amid the spread of a new strain of COVID-19. From December 6, all tourists over 12 years old arriving in the republic, regardless of vaccination status and country of departure, will have to pass a PCR test for COVID-19 upon arrival at the airport.