Chris Nash, the Nottinghamshire batsman, will leave the club when his contract concludes at the end of the current season.
Following recent talks between Nash and representatives of the club, it was mutually agreed for the 37-year-old to pursue opportunities elsewhere.
He will remain part of the Notts Outlaws squad for the remainder of the 2020 Vitality Blast.
“We will certainly miss Chris, as he’s been a terrific influence on many of our players over the last few seasons,” said Nottinghamshire Head Coach Peter Moores.
“It feels like the right time for Chris to move on, as the competition for places has increased in the batting group over the last two seasons.
“He has been playing some of his best T20 cricket during the current season and his ability to put bowlers under pressure at the top of the order has been a key factor in our success so far.
“Chris still has a big role to play during the remainder of the competition and we are hoping to send him off with a glass of champagne in hand following a trophy win.”
Nash, who signed for Nottinghamshire from Sussex ahead of the 2018 season, has made 45 all format appearances for the Green and Golds, passing 50 on 17 occasions.
“I have really enjoyed my three years at Trent Bridge,” he said. “From the moment I arrived, I have been made to feel part of the club by everyone involved.
“We are playing great cricket in the Blast at the moment and my focus is on continuing to contribute and on ending the season with a trophy.
“I have had a long and fulfilling career to date and am still playing really good cricket.
“I feel like I still have a strong desire to perform and, for that reason, I am keen to seek a fresh challenge before moving into the next phase of my life.
“My thanks go to everyone involved with the club, especially the coaches and my teammates, for everything over the past three years.”