MMA Junkie was the first to report the news.
The reason for Magny's withdrawal was not disclosed. The UFC is seeking a new opponent to fight Luque on short notice. UFC Rochester airs on ESPN+.
Magny (21-7) last fought in November in a knockout loss to Santiago Ponzinibbio at UFC Buenos Aires. The Colorado resident was on a two-fight winning streak in the welterweight division prior to that bout. Magny, 31, is a perennial ranked contender in the weight class.
Luque (15-6-1) has won four straight and is attempting to earn a signature win that would get him closer to a title shot. The Brazilian fighter has finished all of his UFC wins. Luque, 27, has won eight of nine since dropping his UFC debut in 2015.