The San Francisco 49ers are not counting on Aldon Smith to return this season, according to sources.

Smith is on an indefinite leave of absence as he undergoes treatment for substance abuse at an in-patient facility. 

Smith is also facing three felony charges of illegal possession of an assault weapon in a case stemming from a 2012 party at his home.

Smith has serious personal issues to address and the 49ers are hoping he can turn his life around.

With so many issues looming, Smith is one strike away from facing a season long suspension from the NFL.