Fiji international Matavesi was cited for a dangerous tackle on Saracens scrum-half Neil de Kock during last Sunday's Aviva Premiership game between the clubs at Allianz Park.
He pleaded guilty to the charge at an RFU disciplinary hearing, English rugby's governing body announced on Wednesday morning.
Matavesi's suspension will run until May 6, ruling him out of Worcester's remaining two Premiership games this season, and then from May 31 to June 6, which covers Fiji's Pacific Nations Cup fixtures against Japan and Canada.
- Sports & Recreation
- Aviva Premiership