His exit was reportedly due to disagreements with the club's hierarchy, despite leading them to Uefa Conference League and Club World Cup victories.
In an Instagram post, Maresca thanked Chelsea fans and players, expressing his peace at leaving the club in a strong position and cherishing the trophy triumphs.
Liam Rosenior, from fellow BlueCo-owned club Strasbourg, has been swiftly appointed as Maresca's successor at Stamford Bridge.
Maresca has been linked with the Manchester City manager role, though Pep Guardiola recently reaffirmed his commitment to the club.