The spinner, who is moving to Kent at the end of the season, will still be available to represent Lancashire in the T20 Blast
Matt Parkinson has re-joined Durham on loan until the end of July.
The spinner will be available in Durham's County Championship matches against Leicestershire, Gloucestershire, Derbyshire and Yorkshire but will continue to represent Lancashire in the T20 Blast if selected.
On June 19, it was confirmed that Parkinson will leave Lancashire at the end of the season after signing a three-year contract with Kent.

Parkinson has fallen out of favour at Lancashire, featuring just seven times for the first XI in all formats in 2023 [Gareth Copley/Getty Images]
Parkinson has struggled for game time with Lancashire in 2023, only featuring in their County Championship opener against Surrey – he returned match figures of 6 for 223, including a second-innings five-for – and half a dozen T20 matches.
He previously went on a short-term loan to Durham in April, taking one wicket in their innings-and-seven-run win over Derbyshire.
Parkinson has played 47 first-class matches across his career, taking 151 wickets at 25.92, and has one Test cap for England.