Dundee have announced the departures of Tyler French, Shaun Byrne and Jack Wilkie.
All three have been on loan at other clubs this season.
French played 35 times for Morton, Byrne is in the midst of a promotion play-off campaign with Raith Rovers and Wilkie spent the first half of the campaign with Edinburgh City.
Dundee have 21 first-team players signed up for next season including Ricki Lamie, who agreed a pre-contract deal during his loan spell from Motherwell.
Ten other loan players have returned to their parent clubs – Owen Dodgson, Amadou Bakayoko, Zach Robinson, Ryan Howley, Jon McCracken, Malachi Boateng, Aaron Donnelly, Michael Mellon, Dara Costelloe and Owen Beck.
The Dens Park finished sixth in the Premiership this season after securing a respectable top-half place in their first year back in the top-flight after a spell in the Championship.
They will be joined by city rivals Dundee United next season after Jim Goodwin’s side won the second-tier.
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