JETS have started searching for a replacement forward after agreeing to release Jamal Brown from his contract.
The 27-year-old American was allowed home at the start of last month on compassionate leave after a family bereavement.
Jets had hoped Brown - who has only been with the club since the end of October - would return, but he has decided to remain in the States.
A statement on the Jets' official website said: 'Jamal Brown has understandably decided he needs to spend more time with his family. Chester Jets have therefore reluctantly agreed to release Jamal from his contract. Jamal very much regrets leaving the team and would like to return next season. Chester Jets extend their sympathy and best wishes to Jamal and his family during this difficult time.'
Jets have had difficulties with some of their American imports this season. Summer arrivals Gentry Lewis and David Fanning lasted only a matter of weeks, with Lewis being sent home due to a poor disciplinary record and Fanning complaining of a mystery foot injury.
Long-serving star Calvin Davis was cut from the club's roster due to long-standing knee injury.
Brown had started to turn in some good performances and his departure presents Jets officials with a major headache as they look out for a replacement.