Derbyshire have deferred the signing of Ben McDermott and Sean Abbott until 2021 due to the coronavirus pandemic.
The Australia pair were originally set to feature for the county this season.
“We’ll keep our options open for this summer,” Derbyshire chief executive Ryan Duckett said.
“These are unprecedented times and following the postponement of cricket until at least 28 May, and the full impact of the current situation yet to be determined, we need to be mindful of our cricket budget in 2020.”
McDermott, 25, is the son of former Australia fast bowler Craig, while Abbott, 28, has been a long-time servant for New South Wales in the Sheffield Shioeld and Sydney Sixers in Australia’s Big Bash.
Both have represented Australia in T20 internationals.