In Bulgaria, restaurants and bars will have to close at 10pm from 7 September, while indoors sports will have to be held without spectators, APA reports citing Reuters.
The new restrictions come as the Balkan country prepares for an expected surge in coronavirus cases.
Bulgaria is the least vaccinated country in the European Union, reports the Reuters news agency, and has seen a significant spike in infections in recent weeks.
Like elsewhere on the continent, it has been caused by the highly transmissible Delta variant.
On Thursday the country registered 1,745 new cases, bringing its tally of active infections to some 32,192.
Some 18,950 people have died since the beginning of the pandemic, with 54 more deaths reported on Thursday in the country with the highest mortality rate in the European Union, figures from Our World in Data showed.
Interim health minister Stoicho Katsarov encouraged Bulgarians to get vaccinated and told reporters:
There is no place for panic. The situation is serious, but not out of control.
The low percentage of vaccinations forces us to impose these measures.