The SASSI-3, or Substance Abuse Subtle Screening Inventory-3, is a psychological assessment tool designed to identify individuals who may have substance use disorders. It utilizes subtle indicators of substance abuse rather than direct questions, making it less likely for respondents to deny issues. The inventory assesses various patterns of behavior and attitudes related to substance use, helping clinicians make informed decisions regarding further evaluation and treatment. It is commonly used in various settings, including addiction treatment, criminal justice, and mental health evaluations.