The COVID-19 pandemic has disrupted medical education worldwide. Universities were forced to rapidly adapt to the evolving situation and develop methods of delivering curricula and assessments online. The purpose of this scoping review was to assess the impact of COVID-19 on medical education and investigate how this effect varies in different income countries. The methodology adhered to PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) extension for scoping reviews. Key terms were searched in six electronic databases. Inclusion criteria included studies describing the effect of COVID-19 on undergraduate medical education in university and clinical settings, studies published post 1 December 2019 and studies published in English. A modified Johanna Briggs Institute data charting tool was used to extract data concerning study characteristics and outcomes. The initial search returned 298 articles. Following duplicate removal and article screening, 33 studies were included. The literature indicated that the pandemic had a negative effect on medical student education worldwide, in both high-income countries (HICs) and low- and middle-income countries (LMICs). A range of factors impacted students and educators, including new curriculum and assessment design, reduced patient contact, use of new technology and lack of infrastructure. However, LMICs encountered more arduous barriers such as lack of access to information technology infrastructure and support from national governments. COVID-19 has impeded medical education worldwide. Future research is needed to address barriers to providing medical education during a pandemic. LMICs need particular support as they have fewer resources and face greater challenges regarding this matter.