[4] In March, Valentín shared the bronze medal of the Dominican Republic Women's Festival in sabre competition.

[11] At the Pan American Games held in Toronto, Canada, she took part in the omen's sabre competition, but lost 8–15 in the round of 16 to American Dagmara Wozniak placing twelfth[12] and ranked seventh in the Fencing at the 2015 Pan American Games – Women's team sabre competition, losing 36–45 to the Venezuelan team in the quarterfinals and winning 45–29 to El Salvador in the 7/8 placement match.

[22][23] She took part in the sabre individual event, ranking fifth in the preliminary round,[24] but lost 11–15 to Cuban Aymara Tablada.

[25] Valentín lost 5–15 to the Argentinian María Belén Pérez Maurice in the zonal tournament,[26] winning the bronze medal but did not qualify for the 2020 Summer Olympics.

[27] She received the Athlete of the Year award in Fencing by the Dominican Republic Olympic Committee.