The decision comes three days after Timo Schultz was appointed as the successor of Jos Luhukay, with the new manager involved in the final decision.
11 players have now left the Millerntor this summer, including transfers and loan ends, with no external new signings confirmed as yet.
“Based on the joint management analysis with Timo Schultz, we decided to realign the relevant positions and against extending the expired contracts,” confirmed sporting director Andreas Bornemann on the club website. “I wish them both the best of luck on their way forward.”
33-year-old Sobota was with the club for five and a half years and quickly settled in despite a relegation battle in his first half campaign with the club. He remained a key player up to the end of last season and captained the club on several occasions.
In an Instagram post, Sobota said he “thought I would stay here until the end of my career,” but says he will “keep the time at this club and in Hamburg forever in my heart.”
Whilst Sobota’s departure is seen as a blow for the fans, Flum’s is less surprising, having not played a major role under Luhukay. Like Sobota, the now 32-year-old joined in the middle of a relegation battle but quickly became an important part of their midfield.
Following the arrival of Schultz, the club have also confirmed André Trulsen, Markus Gellhaus and Hans Schrijver have left the coaching staff. 27-year-old Loic Favé, currently with local sixth-tier side Eimsbütteler TV, has been tipped to join Schultz’s backroom team.