Back
The centre-back has not featured for the Scottish Champions since October 15 when he played 90 minutes against Benfica. He would then sit on the bench for the 7-1 hammering of Hearts.
However, Trusty's father sadly passed away and that is what caused his unavailability since as he returned to his homeland for the funeral and to be with family.
He missed league games against Hibs, Dundee United, Falkirk and Kilmarnock as wells as European clashes with Celta Vigo and Besiktas.
However, it looks like Martin O'Neill may be able to call upon the 28-year-old following the international break.
With the American national team set to face Haiti in a Nations League quarter-final, Trusty has been in training with his international teammates.
A collection of pictures from their training camp in Fayetteville, Georgia, have been posted to socia media and Trusty is seen taking part in the sessions.
Whether he plays or not will be up in the air given a possible lack of match sharpness, but seeing him train will be a boost for O'Neill and Celtic ahead of facing St Mirren in the Premiership and Torreense in the Europa League.