The Germany international moved to Stamford Bridge as a free agent in the summer of 2012, penning a five-year contract.
He has, however, struggled to make an impact in England and was allowed to head for Spain on a season-long deal in June 2013.
With Chelsea now well-stocked for creativity, there would appear to be little chance of Marin forcing his way back into Jose Mourinho's plans.
The 24-year-old accepts as much and would welcome the opportunity to remain in La Liga if all parties are willing to open transfer talks.
Marin told Estadio Deportivo: "If both Sevilla and me are happy to stay, I can stay here forever.
"We'll see what happens in the summer. The first thing is to play, be fit and help the team in the end of the season and then we'll decide.
"If the fans want it, Monchi (Sevilla's sporting director) wants it and the coach wants it, why not?
"But the most important thing is to be fit and play.
"Speaking about a permanent move before that is not worthwhile because I can't help the team if I do not play."