Jones, 22, made the move south to change codes at the end of last season, but has opted to depart the south coast without making a first team appearance for the Chiefs.
Exeter confirmed his exit on their official club website, citing the fact that Jones’ partner Olivia is expecting their first child in June as a reason for his exit.
Jones said: “I cannot speak highly enough of everyone at the Chiefs because it’s a special club with a great culture.
“I want to thank Rob, all the coaches, the players, staff and supporters for everything. Rob gave me a great opportunity and a new challenge, but due to family circumstances I have to cut it short early.
“Even though I’ve only been here a short while, I know I have improved a lot as a player. When you are working alongside so many skilful players, like they have at the Chiefs, you’re always going to add to your game and pick up things.”