The 54-year-old was dismissed just hours after Besiktas were knocked out of the Europa Conference League by Swiss side Lausanne.
Besiktas lost 2-1 on aggregate to Lausanne in their Conference League qualification final round, meaning they won’t feature in any European competition this season.
The Turkish club released a tellingly short statement confirming their decision, simply saying: “Our contract with manager Ole Gunnar Solskjaer has been terminated following a decision made at the board meeting.
“Following the meeting, our chairman, Serdal Adalı, thanked Solskjaer for his services to date.
“We respectfully present it to the public.”
Solskjaer joined the club in January of this year, guiding his side to fourth place in the 2024-25 Turkish Super Lig.