In November last year, Haq, Scotland's all-time leading wicket-taker, told Sky Sports News that Cricket Scotland was "institutionally racist", while former team-mate Qasim Sheikh claimed he had also suffered racist abuse.
The match was scheduled to be part of Australia's tour of the United Kingdom with a limited-overs series against England to follow.
The tournament was scheduled to run from August 30 to September 22 and culminate in two semi-finals and a final in Malahide and was due to feature the likes of Eoin Morgan and Mohammad Amir.
