South Africa have called up Quinton de Kock to their one-day squad after Faf du Plessis was ruled out through injury.
Batsman Du Plessis will miss the final two matches of the series against Pakistan to rest a lower back problem that will also sideline him for the first four weeks of the new Indian Premier League season.
"Faf has been troubled by low back pain over the past while," South Africa team manager Mohammed Moosajee said in a statement released by Cricket South Africa on Tuesday.
"He was recently diagnosed with bony inflammation in the lumbar spine and a six-week rest period has been advised."
De Kock, 20, has so far played three 50-over games for the Proteas, as well as a trio of Twenty20 Internationals.
The wicketkeeper-batsman was selected for the series against New Zealand earlier this year but made way for AB de Villiers to return behind the stumps.
South Africa currently lead Pakistan 2-1 in the series; they next meet in Durban on Thursday before the final match takes place on Sunday in Benoni.