Wyo. Stat. § 35-7-1037
Whenever any person who has not previously been convicted of any offense under this act or under any statute of the United States or of any state relating to narcotic drugs, marihuana, or stimulant, depressant, or hallucinogenic drugs, pleads guilty to or is found guilty of possession of a controlled substance under W.S. 35-7-1031(c) or 35-7-1033(a)(iii)(B), or pleads guilty to or is found guilty of using or being under the influence of a controlled substance under W.S. 35-7-1039, the court, without entering a judgment of guilt and with the consent of the accused, may defer further proceedings and place him on probation upon terms and conditions. Any term of probation imposed under this section for a felony offense shall not exceed the maximum term of probation authorized under W.S. 7-13-302(b). Upon violation of a term or condition, the court may enter an adjudication of guilt and proceed as otherwise provided. Upon fulfillment of the terms and conditions, the court shall discharge the person and dismiss the proceedings against him. Discharge and dismissal under this section shall be without adjudication of guilt and is not a conviction for purposes of this section or for purposes of disqualifications or disabilities imposed by law upon conviction of a crime, including the additional penalties imposed for second or subsequent convictions under W.S. 35-7-1038. There may be only one (1) discharge and dismissal under this section with respect to any person. This section shall not be construed to provide an exclusive procedure. Any other procedure provided by law relating to suspension of trial or probation, may be followed, in the discretion of the trial court.
W.S. 35-7-1037