5★STAR Grand Prix 2020 ~ Day 3 was a professional wrestling event promoted by World Wonder Ring Stardom, held on September 5, 2020 at the Shin-Kiba 1st RING in Tokyo, Japan. It served as the third overall show for the company's annual round-robin singles tournament, which was heavily hamstrung by the then-ongoing COVID-19 pandemic and featured notable rescheduling and several consolidations of events.