Parsons has a new job which make it impossible for him to attend midweek training which is clearly not ideal at National League South level.
He has decided to commit to Bostik League Premier side Worthing, although he will remain dual registered with the Rocks in case he can assist in an emergency.
Since joining the club just over three years ago, Parsons has been a firm favourite with the Rocks fans and also extremely popular in the dressing room.
He played in around 130 matches and scored a number of memorable goals - his brace in a dramatic 5 minutes against Oxford City two years ago in the Emirates FA Cup will be fondly recalled by many.