Taking 5-20 in a standout performance on Friday, medium pace bowler McGrath steered the Stars to victory in their opening one-day match.
Posting the second highest runs score (33) behind Tasmania’s Georgia Redmayne (69), McGrath also contributed significantly with the bat, helping her side to the required total with seven wickets in hand.
The second one-day match was another comprehensive win for the Aussies, getting over the line by 100 runs.
McGrath recorded 20 runs and bowling figures of 0-11 off five overs, while Tess Cooper (57 retired) and Heather Graham (53) combined for an outstanding 95-run partnership.
A dramatic collapse for Sri Lanka saw them lose eight wickets for just 16 runs, with spinner Alana King (6/17) tearing through the batting line up.
Match three saw the Aussies continue their unbeaten run with a 112-run victory over the home side.
An unfortunate duck for McGrath in the third match match did not affect her side, with Redmayne (76), King (58 not out) and Jemma Barsby (51) providing a flow of runs to set a solid total of 261.
Australia’s bowlers put on another impressive display with the ball to restrict Sri Lanka to 9/149 from 50 overs, McGrath contributing 1-11.
The Shooting Stars squad will now look to concentrate on the shorter format, with the first of three Twenty20 matches beginning on Thursday.
6 April: First T20, Bloomfield, Colombo
8 April: Second T20, FTZ Katunayake, Colombo
10 April: Third T20, FTZ Katunayake, Colombo