Esther de Lange again won the toss and batted, with Heather Siegers now partnering Sterre Kalis at the top of the innings. Aided by some poor fielding - the local women finding the outfield even more treacherous than the Dutch had on Monday - the Dutch openers raced to 47 without loss by the end of the powerplay, and went on to post the highest stand of the tour: 72 by the time Siegers was caught in the covers in the eleventh over, having made 27 from 33 deliveries.
Kalis kept going, despite the loss of Cher van Slobbe, brilliantly caught behind by keeper Lihini Apsara after skying a full toss, and reached the half-century she had missed out on on Monday, the milestone coming from just 39 deliveries, with five boundaries.
She departed in the next over, stumped after dancing down the wicket to spinner Sadani Thiwanka, but her 51 from 42 balls brought her tally in three innings to 128 at a strike rate of 92.8. Her batting had gained in confidence and composure over the three matches, and she will be a player to watch when the serious business starts.
After her departure the scoring rate slowed and the flow of boundaries dried up as the Dutch middle order battled against defensive fields. De Lange contributed a run-a-ball 16 before she was run out, and Babette de Leede made an unbeaten 11.
But whereas a total in excess of 140 had at one time seemed to be on the cards, the innings closed on 126 for five, reasonable but somewhat short of the sort of target coach Peter Cantrell will be wanting his batters to set in Bangkok.
The bowlers, on the other hand, immediately regained the initiative by picking up four wickets in as many overs after Kaumadi de Silva and Apsara began at a gallop: De Silva holed out to Christine Erkelens at mid-off from the bowling of Siegers, Cher van Slobbe trapped Harshitha Madhavi leg-before, Jimanjali Wijenayake was run out after a smart piece of fielding by Carmela Appel, and two balls later Siegers struck again, having Tharani Rajapakshe stumped by Miranda Veringmeier.
That made it 20 for four, but Apsara continued to attack, and after she too was dismissed, unlucky victim of another stumping, this time off a Lisa Klokgieters wide, and Klokgieters struck again to dismiss Thiwanka to further reduce the Matara side to 59 for six, captain Maisha Shehani and Iresha Chamali set about rebuilding the innings with an excellent seventh-wicket stand.
So well did they do so, indeed, that at the halfway point they were on 71, the same score the Dutch had been on, and the momentum seemed to be going their way.
It took a run out to change the game once more, a sharp return from Robine Rijke disposing of Chamali for 16, and Matara were 96 for seven.
The Dutch needed some economical overs, and Siegers, Erkelens and Rijke all obliged, stemming the flow of runs and building up the pressure on Shehani and the tail.
The real turning point was Erkelens' dismissal of Shehani, caught behind for a fine 33, made from 32 deliveries, and with another run out, Rijke again the fielder responsible, it was left to Esther Corder to bowl final batter Sanjeewani Nilangika and complete the 13-run victory.