Canada is holding a national election on October 19. Although the Green Party leader, Elizabeth May, has been included in some televised debates, she has been or will be excluded in certain other debates. According to this story, the Green Party has filed an administrative complaint, charging that the exclusion violates Canadian campaign laws. See this story for more detail.
The Green Party is one of four Canadian parties that has candidates for House of Commons in a majority of the districts. The other three such parties are being included in all debates.