The German club want to strengthen their right-back position as the former Tottenham youth defender Kallum Cesay was on test.
Cesay, 21, was released by the London club at the end of the season, still in search of a new destination in club football.
On Tuesday, Bremen informed the player and his agent that they were not planning to work with him.
Professional boss Clemens Fritz told BILD: “After long considerations, we decided against a commitment. Kallum made a good contribution to the days, both physically and personally, and gave his all. But he is still a long way from the Bundesliga.
He added, “Using him primarily in the U23 would have made no sense. We didn’t want to harm any of our boys who we want to develop.”
The Sierra Leone national player with four caps has now left Bremen.