In place of the Brighton TMA, the association will hold a convention in October or November. It said the lack of exhibition revenue would not affect conference services to members.
Glenn Powell, chief executive of the CMA, said, "We are not doing TMA in Brighton but we will be holding a content-led event with speakers and seminars at the same time of year.
"There was not enough support for large stands at a large-scale exhibition, and we have no desire to be an exhibition organisation. We want an event that is right for our members."