The 36-year-old is signed as a replacement for South African Wiaan Mulder, who is expected to travel to the West Indies with the Proteas in August.
Australian Peter Handscomb will replace Rahane. Handscomb has extended his stay with the Foxes to feature in next month's Metro Bank One Day Cup.
Rahane set for county stint with Leicestershire post-IPL
South Africa left-arm spinner Aaron Phangiso has been cleared to play at the World Twenty20 tournament in India after an independent reassessment of his bowling action found it to be legal, Cricket South Africa (CSA) said on Tuesday.
With the opening cricket Test delicately poised after two days of intense action, South Africa have suffered a big blow as pace spearhead Dale Steyn is unlikely to take field, on Saturday, due to a groin strain.
South Africa left-arm spinner Aaron Phangiso will miss the first two Twenty20 Internationals against Australia this week after his action was found to be illegal by the International Cricket Council's testing laboratory.
England Women to tour Pakistan for first time in October.
The paceman had injury problems in the recent ICC Champions Trophy in England, forcing him to miss the semi-final defeat by the hosts, and that has weighed heavily on the minds of the selectors with Test series coming up against Pakistan, India and Australia.