Despite a big 408-run lead, Australia did not enforce the follow-on and at the close on the third day were 81-1 in their second innings, leading by 489 with nine wickets intact.
Australia have two full days to enforce a big win and take a 1-0 lead in the three-match series, their first tour of Pakistan in 24 years.
It all went wrong in the first over after lunch when Haq — who scored twin centuries in the