Falcons pair heading for the Bahamas
The tournament runs from July 19-21, with both players having represented England Under-17s this season in the 15-a-side format.
Kelemeti, the Fijian-born Durham School scrum-half, has also played for England Under-18s.
Blyth-born back-rower Marshall is going into his second year of the Falcons’ AASE scheme at Gosforth Academy, having previously played for Blyth RFC and Bede Academy.