Henson played four games for Saracens this season
Gavin Henson has been suspended for one week by Toulon for breaching the French club's disciplinary code.
According to a statement issued by the Top 14 side, the Wales international did not "respect the code of good behaviour defined by the club".
No further reason was given as to why the 29-year-old centre, who joined the big-spending club on a short-term contract in February, was suspended.
Henson scored a try on his Toulon debut against Stade Francais two weeks ago.
He will miss Toulon's forthcoming match against Perpignan this Saturday.
The flamboyant star had been hoping for an international recall having not played for Wales for over two years following a self-imposed hiatus from rugby.
Earlier this month, Wales assistant coach Rob Howley said it was "very likely" Henson - who can play full-back, centre or fly-half - would feature for his country in June ahead of the start of the Rugby World Cup in New Zealand in September.
Henson joined a growing exodus of French-based British players by signing for big-spending Toulon from Premiership club Saracens, England World Cup-winning fly-half Jonny Wilkinson being one of his team-mates.
However, his international aspirations - and perhaps his latest disciplinary breech - could affect his chances of signing a longer-term contract at the Stade Mayol.
Toulon coach Philippe Saint-Andre is set to lose a number of big names for the World Cup and does not want to lose another player ahead of the new Top 14 season.
Henson has endured an eventful two years following a sabbatical from rugby, the breakdown of his high-profile relationship with singer Charlotte Church as well as a stint as a contestant on Strictly Come Dancing.
He made his long-awaited return to the game with Saracens in December, but his appearances were limited by the emergence of exciting backs Owen Farrell and Brad Barritt, as well as a torn calf muscle.
After four appearances for Sarries, Henson was released from his contract and Toulon - bank-rolled by millionaire Mourad Boudjellal - swooped to take him to the French Riviera on a five-month deal.
He played 80 minutes at inside centre in the 38-10 victory over Stade Francais, crossing the tryline to complete an impressive home debut earlier this month.
Henson has won 31 caps for Wales and also toured New Zealand with the 2005 British and Irish Lions.