Ngarava is still recovering from an issue with his back that kept him out of the home series against Australia, with Zimbabwe also set to play three T20Is and two Tests against Afghanistan in a separate bilateral series in the UAE.
Zimbabwe have made two changes to their ODI squad with wicketkeeper Tafadzwa Tsiga and legspinner Vincent Masekesa included and could potentially make their debuts in the 50-over format.
Raza, Craig Ervine and Brendan Taylor provide experience in the batting unit while lanky fast bowler Blessing Muzarabani will lead the bowling attack.
Zimbabwe ODI squad: Sikandar Raza (captain), Ben Curran, Blessing Muzarabani, Brad Evans, Brendan Taylor, Brian Bennett, Craig Ervine, Ernest Masuku, Newman Nyamhuri, Ryan Burl, Tadiwanashe Marumani, Tafadzwa Tsiga, Vincent Masekesa, Wellington Masakadza, Wessly Madhevere
Zimbabwe T20I squad: Sikandar Raza (capt), Ben Curran, Blessing Muzarabani, Brad Evans, Brian Bennett, Innocent Kaia, Kundai Matigimu, Newman Nyamhuri, Ryan Burl, Tadiwanashe Marumani, Tafadzwa Tsiga, Vincent Masekesa, Wellington Masakadza, Wessly Madhevere
The Proteas Women completed a clean sweep in the five-match T20I series against Zimbabwe in Bulawayo, although the hosts put up a much improved showing to only go down by 13 runs in the final contest on Saturday.
Travis Head struck a century as Australia beat Zimbabwe by 84 runs in the second ODI in Harare on Friday, with the visitors taking an unassailable 2-0 lead in the series with a game to spare.
Matt Renshaw and Nathan Ellis starred as Australia opened their three-match ODI series against Zimbabwe with a 59-run victory in Harare.
Lhuan-dre Pretorius smashed 94 before captain Bjorn Fortuin took four wickets as the Proteas cantered to a 43-run victory against Zimbabwe in the T20I tri-series in Windhoek.
