Kilmarnock were relegated following a play-off defeat to Dundee last month.
The Ayrshire club will play Championship football next season after defeat to Dundee in their Scottish Premiership play-off final.
Manager Tommy Wright was meeting with his squad on Tuesday.
Manager Tommy Wright revealed he discovered by text message that the midfielder had returned to France.
Assistant manager Andy Millen said the club didn't take 'shortcuts' with Covid protocols.
Rugby Park club don’t know how their players became infected, and believe they have followed all of the protocols, but they’ll now look to convince the league of that.
Raman Bhardwaj brings you the latest sports news.
Rugby Park club launch investigation after racist abuse allegedly aimed at Rangers striker.