Somerset have announced the cancellation of Corey Anderson's contract by mutual consent.
Anderson, the New Zealand allrounder, had signed for all 14 group-stage games in the T20 Blast, and potentially the knockout stages, but his deal has been called off due to the Covid-19 pandemic.
"The last few months have not been an easy time for anyone and the challenges of dealing with the impact of the pandemic within cricket have been unprecedented," said Andy Hurry, the club's director of cricket. "I would like to thank Corey and his representatives for their transparency and understanding in reaching this mutual decision.
"It's obviously really disappointing news to everyone as there was a real buzz around Corey returning to Taunton. However, this decision provides Corey and the club with clarity in a time of uncertainty."
A club statement said: "This decision suits both parties at this time and it is hoped that Corey will return to play for the county at some point in the future."