Samassa, 23, made 25 appearances in the 2019/20 season and first arrived at the club in December 2018.
He has decided to stay in France after two years in the UK, signing for Paris based CS Bretigny.
Versatile midfielder Seosolo returned to France following the suspension of the season and made 23 appearances in his only season in England.
He has now linked up with RC Lons, based in a small town north of Lyon.
Glossop North End joint managers Pete Band & Lloyd Morrison said” ' Jeremy has been a great addition to the squad since his arrival in the UK, he's had a great attitude and has been a good team player who would play in any position for the team when required.”
Meanwhile, the Hillmen have appointed Ollie Wright and Lee Bolton to their backroom staff.
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