The role of the physiotherapist has adapted over many years to incorporate a holistic and biopsychosocial model of treatment and management, inclusive of addressing the psychological factors that patients are facing. With a rise in mental health awareness, especially in light of the COVID-19 pandemic, mental health disorders are being normalized and therefore publicized more frequently worldwide. This population therefore includes patients who are seeking care at physiotherapy clinics. Even with this rising incidence, physiotherapists continue to carry inconsistent perceptions of their preparedness and role in treating patients with mental health disorders. This systematic review aims to primarily summarize the perceptions of physiotherapists regarding their role in treating and managing patients with mental health disorders. Another aim is to investigate the perceived barriers and facilitators that physiotherapists face when treating and managing patients with mental health disorders.