Cardiff say they have begun a review process to find Sherratt’s long-term successor.
The region’s interim managing director, Jamie Muir, said: “The fact he has been approached by Wales is testament to the progress we have made as a club with him at the helm as head coach.
“We are confident with the staff that remain in place and are fully focused on kicking off the new season on Saturday night in positive fashion.”
Former Ospreys coach Tandy became Wales head coach on 1 September and has already added Danny Wilson to his management team with responsibility for the line-out and contact areas.
Wales have four autumn internationals in November against Argentina, Japan, New Zealand and South Africa.
Born in Gloucester, Sherratt cut his teeth at Gloucester and Cheltenham and spent four years at Worcester Warriors’ academy, before becoming an attack specialist for Bristol, Ospreys and Cardiff.
After another spell at Worcester, Sherratt returned to Cardiff for a second stint as backs and attack coach in 2021 and spent the past two seasons as head coach, with the Welsh club finishing 12th and then ninth in the URC.
“I am proud that we have been able to put the club back on solid foundations, have implemented a playing style that resonates with the history and city, and enjoyed so many memorable moments at the Arms Park,” added Sherratt.
