The defender was previously in France with Dunkerque during part of last season.
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The 21-year-old was highly rated when he signed for the Reds in 2018, but has failed to make the grade so far.
Koumetio has made 49 appearances for Liverpool's Under-21 team, but only played two senior games.
Per The Mail, he will now have a chance to resurrect his career north of the border.