There were 660,000 confirmed cases overseas and 120,000 in the United States for the first time.
Trump extended his "social distancing advice" to April 30.
Singapore's aviation and tourism industries are dead, says lee Hsienloong.
Britain has upgraded its lockdown order to require people to "stay at home and stay indoors".
Experts said there could be as many as 200,000 new deaths in the United States.
Asia-pacific stocks opened lower, with Japanese and south Korean shares falling more than 2%.