Individuals' mental health was negatively impacted by their confinement during COVID-19. Mental health is the "psychological condition of a person working at a satisfactory level of behavioral and emotional adjustment." As adolescents grow and mature, they frequently encounter a variety of emotional conflicts. Short episodes of depression also happen to occur, which are temporary. During this phase, the individual also encounters difficulties with self-control, social assimilation, academic performance, family life, and interpersonal and community relationships. This study was conducted to know the relationship between self-control and the mental health of Smartphone addicted adolescents. Using the Smartphone Addiction Scale, Mental Health Scale, and Self-Control Scale, the researcher collected data from a sample of 150 ninth-grade students using the Smartphone Addiction Scale, Mental Health Scale, and Self-Control Scale. By qualitatively analyzing the data, the study reveals a negative and statistically significant relationship between the variables that may aid in raising awareness of the negative impact of smartphone addiction among adolescents, parents, teachers, social workers, planners, managers, and policymakers in the fields of education and psychology