23-year-old Schumacher who signed from Bradford City during the summer had been out for the last few games with a hamstring but came on as a sub against Yeovil Town.
The injury was picked up in training yesterday with the player landing awkwardly on his ankle and after a scan it revealed that he will be out until the New Year.
As a result of the injury the club could turn their attentiones to Kenny Lunt who has alerady been linked with a loan move back to the club.