Match authorities canceled play at 3:05 pm (0905 GMT) as the downpour proceeded.
Not a solitary ball was rocked the bowling alley on the second day after Bangladesh came to 246-8 in their first innings on the opening day.
The highlight of the second Test so far is South African pacer Dale Steyn's 3-30, which empowered him to wind up only the thirteenth cricketer in history to assert 400 or more Test wickets.
The primary Test in Chittagong finished in a draw after downpour washed out play on the most recent two days. (AFP)