Zalmi eliminated after losing to Lahore Qalandars, who will face the Sultans in the Eliminator 2 for a place in the final. The local team scored 13-2 in the Super Over, with the Sultans falling four runs short.
The national captain Babar Azam, smacked a 53-ball 65, hitting two sixes and five boundaries before falling with 25 still needed.
Multan Sultan managed a below-par 141-7 in their 20 overs after they were sent in to bat, with former England all-rounder Ravi Bopara scoring a 31-ball 40 with three boundaries and a six.
The final is scheduled for Tuesday, at National Stadium Karachi.