Stephens shot 37.4 percent from three for the Lions last season.
Amid coaching and roster changes, the Terps struggled to adapt and deliver.
The Terps bring back three leaders in Eric Ayala, Donta Scott and Hakim Hart, all set to have banner seasons.
Coach Mark Turgeon had an active offseason in the transfer portal and the results brought players ready to make an impact.
The Terps added nine new players to their squad, but the team said they are close on and off the court already.
Dziuba is the fourth player to transfer into Mark Turgeon's program this offseason.