The patient is a 76-year-old man from the US, who travelled to Bhutan as a tourist, said the Prime Minister's Office of Bhutan in a statement on Facebook.
He left Washington DC on 18 February and together with his partner toured India from 21 February to 1 March - before heading to Bhutan on 2 March.
He did not show any signs of fever upon arriving in Bhutan, but days later was found to have a fever, sore throat, cough and shortness of breath.
The US man, who suffers from chronic hyptertension, has now been isolated and is on oxygen support.
Bhutan is now working to trace all those who might have come into contact with him.
(Source: BBC News)