 In March 2020, the COVID-19 pandemic resulted in a loss of ridership on the TTC.As a result, on March 24 the TTC shortened the 503 Kingston Rd route to run only along Kingston Road between Bingham Loop and Woodbine Loop.Then, effective May 11, the 22A Coxwell bus replaced the remainder of the 503 route full-time

On June 22, 2020, streetcar service returned to the route, running from Bingham Loop (Victoria Park and Kingston Road) to Spadina Avenue (Charlotte Loop).