Also included is fast bowler Anrich Nortje, but in-form opening batsman Temba Bavuma will have to prove his fitness after injuring his hamstring against England on Sunday.
Captain Virat Kohli, who smashed an unbeaten 72 to guide India to a seven-wicket win over South Africa in the second T20 International in Mohali on Wednesday
However, South Africa have lot of openers stacked on top (Bavuma, Quinton de Kock, Aiden Markram, Rassie van der Dussen and Reeza Hendricks) with a light middle order which is still a huge concern.
South Africa needed three off the last two balls but Tom Curran, who had just been smashed for 12 runs in three by Dwaine Pretorius, got him lbw then had Bjorn Fortuin caught off the final ball to cap off a day of almost unrelenting excitement and set up a thrilling decider in Centurion on Sunday.
Dube smashed an unbeaten 45 off 28 balls while Pandey plundered 81 off 59 balls as India A overcame a poor start to win the rain affected match rather comfortably in the end. Chasing 208 in 30 overs, India A reached the target in 27.5 overs.
IMAGES from the 3rd and final T20I played in Bengaluru on Sunday
Steyn replied to a tweet from a user who pointed out that Chris Morris was not named in the squad as he made himself unavailable for the T20I series.
Dube smashed an unbeaten 79 off 60 balls that included a half a dozen of sixes and three boundaries which took India's score to 327 for 6 in 47 overs.
Smarting from opening game losses, a good batting display will be high on the agenda for South Africa and defending champions West Indies when the two teams lock horns in a Super 12 match of the T20 World Cup in Dubai on Tuesday.
India will be looking to round off their T20 World Cup preparation with a marked improvement in their death bowling besides providing crucial game time to its untested players in the three-match series against South Africa.
Fast bowler Anrich Nortje, wicketkeeper/batsman Rudi Second and spin bowling all-rounder Senuran Muthusamy have been included in the 15-man squad that will be captained by Faf du Plessis.
Australia, who are searching for their maiden T20 title, enter the tournament on the back of a horrific run, losing bilateral series to Bangladesh, West Indies, New Zealand, India and England.
Rajkumar Sharma, the childhood coach of India captain Virat Kohli asked wicketkeeper-batsman Rishabh Pant to be more careful while playing in T20s.
'They are formidable but not unbeatable. It was just one phase with the bat where we let ourselves down and a quality side like India made us pay'.
It may be an inconsequential game on paper but Indian bowlers await another tough test against South Africa ahead of the T20 World Cup when the two teams meet in the final game of the three-match series in Indore on Tuesday.
India will surely fancy their chances of an encore, at the M Chinnaswamy Stadium.
The 3-0 series win against the West Indies could be called a precursor and the real battle begins now against Quinton de Kock's Proteas who are also in the midst of a tough transition.
Punjab youngster Shubman Gill would be keen to prove his credentials during the upcoming five-match ODI series against South Africa 'A'.
Umesh Yadav and Mohammad Siraj have been added to the squad as injury replacements but they do not figure in the World Cup-bound squad, as of now.
Rishabh Pant's form would be an important sub-plot when India look to seize the advantage against South Africa
Rajneesh Gupta throws up all the numbers of how both teams have fared in Twenty20 Internationals.