Scott joins Jahmir Young as a key starter to use their extra year of eligibility for the Terps during the 2023-24 season.
Stephens shot 37.4 percent from three for the Lions last season.
Jones is set to replace former assistant Tony Skinn, who left the program to become head coach at George Mason.
The Terps exceeded expectations in a 21-12 season that ended in the second round of the NCAA Tournament.
The guard, who led the Terps in scoring, will use his extra year of eligibility.
Hart becomes the second Terp to enter the transfer portal this offseason.
The Terps suffered their largest loss in the NCAA tournament since 2000 in their final game of the 2022-23 season.
The Terps fell to the top-seeded Crimson tide in the second round of the NCAA tournament to bring an end to coach Kevin Willard's inaugural season.
Reese played a career-high 37 minutes and racked up 17 points, nine rebounds and three assists to go along with three blocks in his first NCAA tournament game.
Hakim Hart and Julian Reese combined for 32 points to help the Terps advance.