Coventry trio Andrew Whing, Che Bunce and Arran Lee-Barrett will not be offered new deals when their contracts expire at the end of the summer.
Defender Whing, 22, came through the ranks at the Championship club.
New Zealand international defender Bunce, 31, and 27-year-old defender Lee-Barrett only joined in January.
Sky Blues boss Iain Dowie said: "This has been a tremendously difficult decision but sometimes decisions like this have to be made in football."
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