The 32-year-old will be out for three to four months as a result of the injury, and his absence is a huge loss for the Costa Rican’s.
Head coach Jorge Luis Pinto revealed the extent of the injury in a press conference on Thursday.
“After analyzing the doctors' opinion and talking with the player, we have to face the reality, Alvaro will not play at the World Cup. We hope he recovers on time to travel with us to Brazil. It really hurts, because he's an extraordinary man.”
“It will be tough to replace him. We are ready for a situation like this,” Pinto added.
The Real Salt Lake forward was set to play in his second World Cup after featuring for the Ticos at the 2006 finals in Germany.
He has scored 32 goals in 93 appearances for his country and he will be sorely missed as Costa Rica look to do the impossible by making it out of a tough Group D alongside Uruguay, Italy and England.
Saborio has been in good form with Real Salt Lake in Major League Soccer this season, scoring five goals in nine appearances and his injury is a major blow for last year’s MLS Cup runners-up too.