Aviva Premiership champions Saracens have confirmed that Namibia's World Cup captain will undergo knee surgery this week.
They say he is expected to return to fitness within nine months.
Burger's all-action performances in Saracens colours confirmed him as one of the Premiership's most effective overseas signings.
But his game-time has been limited this season, and he will now sit out the remainder of a campaign that could see Saracens win a domestic and European double.
They are currently second in the Premiership and on course for a home play-off tie, while French club Clermont Auvergne are their Heineken Cup quarter-final opponents next month.
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.