John Tory, Olivia Chow and Doug Ford are set to begin the debate at 7 p.m. ET at The Peoples Church on Sheppard Avenue East. CBC News will livestream the event.
The panel discussion-style engagement is hosted by an umbrella group consisting of more than 30 organizations and will focus primarily on the "economic, social and political inclusion of immigrant communities in Toronto," according to event organizers.
Chow and Tory met in a one-on-one debate at a downtown hotel earlier Tuesday, during which Chow repeatedly attacked a perceived lack of details in Tory's plans to fund his platform. Ford did not attend.
Tuesday marked the first day of advance voting in each of the city's 44 wards.
The Oct. 27 election is now less than two weeks away. Chow, Ford and Tory are among dozens of candidates seeking to be elected as the city's next mayor.