Ryan Eagleson will be appointed to the interim national bowling coach position for the upcoming T20 World Cup in October.
Balbirnie scored 102 from 117 balls and Harry Tector added 79, including four sixes, as Ireland posted 290-5 in the second of their three-match ODI series at The Village on Tuesday.
Ireland and South Africa will lock horns in three ODIs and three T20Is, beginning July 11.
Rankin made his Ireland debut in 2003 and played last for the country in a T20 against Afghanistan in Greater Noida in 2020.
Cricket Ireland has temporarily suspended elite men's training sessions after a player returned a positive test for COVID-19.
England's selectors were keen to get him red-ball practice ahead of the Ashes series against old rivals Australia.
Scotland recorded their biggest victory when they beat England, the top-ranked one-day international team, by six runs on Sunday.
Ireland are open to touring Pakistan if 'all the stars align,' the chief executive of men's Test cricket's newest nation has said.
Porterfield was in no doubt Ireland's elevation to Test cricket after a thrilling debut ended in a five-wicket loss to Pakistan.