Veterans Small Business Opportunity and Protection Act of 2013 - Treats the surviving spouse of a service-disabled veteran who acquires the ownership interest in a small business of the deceased veteran as such veteran, for purposes of eligibility for VA service-disabled small business contracting goals and preferences, for a period of: (1) 10 years after the veteran's death, if such veteran was either 100% disabled or died from a service-connected disability; or (2) 3 years after such death, if the veteran was less than 100% disabled and did not die from a service-connected disability.

Treats a small business acquired by the surviving spouse or dependent from a member killed during active duty as a small business owned and controlled by a service-disabled veteran, for purposes of VA small business contracting goals and preferences. Continues such treatment for the period beginning on the date of the member's death and ending on the earlier of: (1) the date on which the surviving spouse remarries or relinquishes, or the date on which the surviving dependent relinquishes, such ownership interest; or (2) ten years after the member's death.