Diomande’s contract had been due to expire at the end of the current Sky Bet Championship season.
The 28-year-old joined the Tigers early in the 2015/16 season and scored three times as Steve Bruce’s side won promotion to the Premier League via the play-offs.
In total, Diomande played 64 times for the Club and scored eight goals. His most recent appearance came in the 1-1 draw with Barnsley back in February.
We would like to wish ‘Dio’ all the very best for the future and thank him for his efforts in black and amber.