Callum Marshall has returned to parent club West Ham United to continue his development with the Hammers.
As part of the agreement, the Northern Ireland international can re-join the Baggies for the duration of his loan, if requested.
The 19-year-old has made three appearances since signing from the Londoners in January.
The club would like to place on record its thanks to Callum for his efforts since arriving at The Hawthorns.
