Karla Marlene Sánchez Rodríguez (born October 27, 1991, in Guadalajara, Jalisco) is a Mexican modern pentathlete.

Sanchez qualified for the 2008 Summer Olympics in Beijing, where she competed as a lone female athlete in women's modern pentathlon.

In the early rounds of the competition, Sanchez displayed her strong performance by attaining a fourth-place finish in the air pistol shooting event (AP40), with a score of 186 points.

[2] She placed eighteenth in one-touch épée fencing, with a total of seventeen victories and eighteen losses, but dropped to a lower position in freestyle swimming and show jumping segments.

Following her poor performance in the final rounds, Sanchez finished the event with cross-country running in twenty-eighth place, for a total score of 5,156 points.