It is understood that Chahar is currently at home as a close family member has not been keeping well and he urgently needed a break from the sport.
Chahar missed out on the fifth and final T20 International against Australia in Bengaluru, last Sunday, as he had to rush back home after being intimated about a family member's illness.
"Deepak hasn't yet joined the team in Durban as a close family member needed urgent hospitalisation. He had taken permission for a break as he needed to attend to his family members. He may or may not join the squad depending on his family member's health in the coming days," a senior BCCI official told PTI on condition of anonymity.
The BCCI brass understands that Chahar might not be in the best frame of mind till the family member in question fully recovers and hence if he doesn't wish to join the team now, he would be excused.
The 31-year-old Rajasthan veteran boasts best figures of 6/7 in T20 International and his prolonged absence due to injury did affect the T20 squad's balance in the past two years.
However, the other two members of the T20 squad, Shubman Gill and vice-captain Ravindra Jadeja, who were holidaying abroad after the World Cup final have directly linked up with the squad in Durban and have attended practice sessions.