This study aims to examine the relationship between stigmatization and the sense of family belonging among individuals with substance addiction or illicit substance use. The research was conducted on a sample of 351 male participants under probation. The Substance Use Stigma Mechanisms Scale (SU-SMS) and the Family Belonging Scale (FBS) were employed to measure the relevant variables, and a correlation analysis was performed to assess their relationship. The findings indicate a significant negative correlation between participants’ sense of family belonging and their experiences of stigmatization. Accordingly, it is crucial that all professionals who serve individuals with substance use disorders and their families should be provided with regular psychosocial support, and they should prioritize socialization processes. By ensuring the continuity of this approach, we are hopeful that prioritizing solution-focused interventions that meet the needs of clients will increase their sense of family belonging and reduce stigma.