By SABC Sport
2nd August 2023
The 27-year-old scored eight goals in 30 games across all competitions last season.
Brighton boss Roberto De Zerbi said: "It is with some regret we decided to let Deniz go and play.
"Last year he was crucial for us in achieving our goals, but he deserves that chance.
"We wish him well for the season with Stuttgart and we look forward to welcoming him back at the end of the season."