The young defender injured his ACL in February against Manchester United and needs to play games in order to regain match fitness.
According to the 'Daily Mail', Schalke have offered to take the Frenchman on a season-long loan and Chelsea are considering the offer.
However, the Blues may be reluctant to let the promising defender leave the club, even if it is on a temporary basis.
Antonio Conte has already said that his side are short of defenders and will probably have to sign a defender before he considers letting Zouma leave the club on loan.