Formal attire or Indian formal.

"Formal wedding attire sits between cocktail and black tie on the wedding dress code scale. It's slightly more elevated than cocktail attire and a touch less dressy than a black-tie nuptial...Formal wedding attire offers a bit more flexibility than black tie, so ankle-length dresses and dressy separates are acceptable, as well as fitted, darker-hued suits paired with a crisp white button-down and tie."