South Africa won the T20I series with England by 58 runs in the second match on Thursday.
After the Proteas were put into bat in Cardiff, Rilee Rossouw hit 10 fours and 5 sixes in 55 balls to get them to 207-3.
England was trying to beat its third-highestT20 score, but they were all out for 149 in 16.4 overs. Jonny Bairstow scored the most runs with 30, and Tabraiz Shamsi was the best bowler with 3-27 off his four overs.
South Africa had a big change after losing by 41 runs in the first T20 on Wednesday. On Sunday, the game at Southampton will decide who wins the series.
“We held our catches, we were lot clearer and the batters were phenomenal,” South Africa captain David Miller said. “We had a few meetings this morning to clear up a few things. We had to pick ourselves and did this game, which is great.”
England lost wickets at regular intervals. Jos Buttler made a fast start with 29 off 14 balls at the top of the order, while Jason Roy (20), Moeen Ali (28) and Liam Livingstone (18) also failed to kick on.
“A few guys got starts but didn’t play that match-defining innings that Rilee did,” said Buttler, England’s captain.