The event technical committee approved the change Monday. The confirmation was conveyed to Cricket Australia (CA) on behalf of the committee.
Jonassen has not recovered sufficiently from a recent knee surgery and is unable to compete in the event.
Chappell is 29b yearsn old and currently uncapped for Australia. She is a right-handed batter and right-arm off-spin bowler from Perth and replaces Jonassen, who is a left-handed batter and left-arm spinner.