( CNN ) -- World number two Phil Mickelson has indefinitely suspended his PGA Tour schedule after his wife was diagnosed with breast cancer . Phil and Amy Mickelson have been married for 13 years and have three children . Three-time major winner Mickelson was due to play at the Byron Nelson Championship starting on Thursday and defend his title at Colonial next week -- but has withdrawn to be alongside his wife , Amy . `` After undergoing an extensive battery of tests Phil Mickelsons 's wife , Amy , has been diagnosed with breast cancer , '' said a statement on the American 's official Web site . `` More tests are scheduled but the treatment process is expected to begin with major surgery , possibly within the next two weeks . '' Mickelson met his wife , a former cheerleader for the Phoenix Suns National Basketball Association team , in 1992 and they were married in 1996 . They have three children -- nine-year-old Amanda , seven-year-old Sophia and Evan who is six . PGA Tour commissioner Tim Finchem said on the official PGA Web site : `` We are saddened by the news of Amy Mickelson 's diagnosis , but are hopeful that with the support of Phil and her family and friends , she will come through this difficult tim . `` The thoughts and prayers of everyone connected with the PGA Tour are with the Mickelson family . '' World number one Tiger Woods added : `` Elin and I are deeply saddened to hear the news about Amy . Our thoughts and prayers are with her , Phil , the children and the entire Mickelson family . ''
World number one Phil Mickelson has suspended his PGA Tour schedule . Phil Mickelson has withdrawn to be alongside his wife Phil Mickelson who has breast cancer . The pair have been married for Thursday and have two daughters and two son .