Great Britain will not send a team to Tokyo 2020 if the spread of coronavirus continues as predicted, says the British Olympic Association chairman.
Australia and Canada have announced they will not compete in Japan.
The International Olympic Commitee has given itself four weeks to decide on the future of this summer's Games.
"We can't see any way that this can go ahead as things are constituted," said Hugh Robertson. "I expect we will be joining Canada and Australia shortly."
As of Sunday, there had been 5,683 confirmed cases of coronavirus in the United Kingdom, with 281 deaths.
The UK government has urged the public to follow advice on social distancing, with MPs debating stricter measures to ensure people comply.