The 24-year-old struggled for game time at Stamford Bridge last season but is now hoping to "show his value" at the Ramon Sanchez Pizjuan
The Germany international arrived at Stamford Bridge 12 months ago but managed just six Premier League appearances for the Blues.
Marin has now been sent on loan to the Ramon Sanchez Pizjuan, and the 24-year-old is determined to make the most of this chance to shine in "one of the best" leagues in the world.
“I come here with more ambition than when I signed for Chelsea,” the attacking midfielder told reporters on Friday.
“Sevilla is a club of tradition that I have come to for the new season with the hope of helping them return to a position in the league that they occupied not so many years ago.
“I hope to take on the role of a leader. After talking with 'Monchi' [Sevilla sporting director Ramon Rodriguez Verdejo] and [midfielder] Ivan Rakitic, who is also a leader in the team, I have understood the project and the philosophy of this club.
“I want to show my value here."
Marin managed just one goal in 15 appearances in all competitions for Chelsea last term.