Howe confirmed the extent of Wilson's new injury after Bournemouth produced a clinical performance to stun Chelsea 4-0 in the league on Wednesday.
"Callum just had a very very minor knee operation, just to clean it out. He will be around about three weeks we think, so not too serious," Howe told reporters.
Tenth-placed Bournemouth next face a trip to relegation-threatened Cardiff City on Saturday.
(Reporting by Hardik Vyas in Bengaluru; Editing by Amlan Chakraborty)
