Update 2021-05-19 (2): According to British authorities, all flight routes towards Sri Lanka have been suspended from Friday (21 May) to 31 May. Leaving the country by plane is still possible.
Update 2021-05-19 (1): According to OSAC information from Wednesday (19 May), Sri Lanka has imposed several new COVID-19 restrictions. Among other things a general curfew from Friday (21 May) at 11:00 p.m. to Tuesday (25 May) at 04:00 a.m. and again from Tuesday (25 May) at 11:00 p.m. to 28 May at 04:00 a.m. (local time). Additionally, Monday (24 May) and Tuesday (25 May) have been declared special holidays.