The opening three track and field meetings on the elite Diamond League circuit have been postponed in response to the growing global crisis around the new coronavirus.
The meetings affected are Doha on 17 April, Shanghai on 16 May and another Chinese venue that was yet to be named, on 9 May.
"This decision was made in close consultation with organising committees, local authorities and sports governing bodies," Diamond League organisers said in a statement.
"It is forbidden to enter Qatar from a number of countries and the government in Doha has suspended all national and international events for a period of 30 days.
"While the number of new infections is now decreasing in China, the fact remains that preparations for the meetings have been set back by several weeks and the closed borders and travel restrictions make it impossible to organise international top level competitions."
Organisers added that the current plan was to stage the Shanghai event on 13 August.
New dates for Doha and the second meeting in China remain to be announced, with a possibility being that they could be held after the 9-11 September Diamond League final in Zurich.