England Women Under-19s lost the Twenty20 series after falling 2-0 behind to an Emerging South Africa XI at Potchefstroom.
Fielding first after the home side elected to bat, England made a fine start when Grace Gibbs bowled Zizipho Mdebuka in the second over.
Georgia Hennessy then dismissed the dangerous Yolani Fourie with 41 on the board but South Africa rebuilt, albeit slowly, through Nonkhululeko Thabethe and Chene Bester.
The pair put on 41 before England took three quick wickets with Fi Morris, Hennessy and Freya Davies the successful bowlers.
Davies and Gibbs claimed a further scalp each as South Africa finished on 112 for seven.
Despite losing three quick wickets, England rattled along at a decent rate and, having reached 68 for three after 11 overs, would have expected to coast home.
However, the collapsed dramatically once Izzy Collins was dismissed for 21, which was the highest score of the innings.
Fourie was the chief destroyer, finishing with 5-18 from four overs, as England lost their last seven wickets for just 31 runs.