Jonassen is currently isolating at home in Brisbane and is due to depart next Monday ahead of Australia’s final two matches of the series which also features Pakistan.
Graham was a travelling reserve during the ODI World Cup this year and was briefly elevated into the main squad when Ash Gardner had Covid. She is currently uncapped in T20Is having played one ODI against Sri Lanka in 2019.
Jonassen would usually be a first-choice selection in Australia’s T20I side and there is no like-for-like cover as a left-arm spinner. Her absence could mean a chance of both legspinners, Alana King and Amanda-Jade Wellington, teaming up as they did twice during the ODI World Cup.
The tri-series in Ireland, which begins on July 16 when Australia face Pakistan, provides preparation for those two sides ahead of the Commonwealth Games in Birmingham at the end of the month.