Sussex have announced that Chris Liddle, Ashar Zaidi and Steffan Piolet are to leave the club.
Liddle and Zaidi have opted to move on in a bid to secure regular cricket elsewhere.
Meanwhile, 27-year-old all-rounder Piolet has decided to retire from the game to focus on a career in recruitment.
Speaking to the club's official website, cricket manager Mark Robinson said: "Lids has been with us for nine years, been a really popular member of the squad, and has enjoyed much success in that time with the team winning trophies and we wish him luck in his search for another county.
"Ash fitted in instantly on his arrival and proved to have not only a shrewd cricket brain, but a generous, caring personality.
"Steff is somebody who was with us a youngster, and has played the last two years. He was a fierce competitor, a valuable member of the dressing room, and I'm sure, like Ash, will be a success in the next stage of their life."
Sussex's defeat on the final day of the campaign to Yorkshire meant that they will play next season in the second tier of the County Championship for the first time in five years.
