Town midfielder Nabil Abidallah is to join Swiss club on trial with a view to a permanent move. The Dutchman, 20, moved to Portman Road from Ajax in the summer of 2000.
The diminutive dynamo has another year left on his Town contract but has made only three appearances for the Blues, all as sub, the latest in the FA Cup match against Morecambe in January.
FC Thun are currently struggling in the Swiss top division.