Sri Lanka is the third team in the event in which all three teams face each other twice with the top two teams playing the October 16 final.
Pakistan gave a one-day debut to opener Bazid Khan and pacer Rao Iftikhar.
Bazid is the son of former Pakistan captain Majid Khan.
Teams: Pakistan: Inzamam-ul Haq (captain), Shahid Afridi, Yasir Hameed, Bazid Khan, Shoaib Malik, Yousuf Youhana, Moin Khan, Abdul Razzaq, Shoaib Akhtar, Rana Naveedul Hassan, Rao Iftikhar
Zimbabwe: Tatenda Taibu, Brendon Taylor, Dion Ebrahim, Vusimuzi Sibanda, Mark Vermeulen, Stuart Matsikenyeri, Mluleki Nkala, Elton Chigumbura, Prosper Utseya, Douglas Hondo, Tinashe Panyangara
Umpires: Mark Benson (ENG), Nadeem Ghauri (PAK)
TV umpire: Asad Rauf (PAK)
ICC match referee: Jeff Crowe (NZL)