Diamond League events in Stockholm, Naples and Rabat that were scheduled for late May have been postponed amid the coronavirus pandemic, organisers said on Friday.
The Diamond League has now postponed five events in the 2020 season, after meets scheduled for Doha and an unspecified host city in China were also moved.
Organisers said an alternative calendar would be released in due course.
"The decision was made in close consultation with all the relevant parties. The dynamic global spread of the COVID-19 disease, the travel restrictions expected to be in force for some time and above all concerns over athlete safety have made it impossible to stage the competitions as planned," it said in a statement.
"The meeting organisers, the Wanda Diamond League and World Athletics remain committed to delivering a structured extensive season in 2020. The aim is to ensure that athletes can compete at the highest possible level this year, and that fans will be able to see their favourite stars in action, whenever the global health situation allows.
"New dates for Wanda Diamond League events will be announced in cooperation with the World Athletics Global Calendar Unit as soon as the extraordinary situation makes a reliable plan possible."
The coronavirus pandemic has resulted in the cancellation or postponement of sporting events across the world. Tokyo 2020 was the latest event to be affected with the Games being moved to 2021 on Tuesday.
Information from Reuters contributed to this report.