Spencer qualified for the 2015 World Championships in Athletics, in Beijing, and the 2016 Summer Olympics in Rio de Janeiro, by clearing 1.94 m at the Meeting Madrid in July. This made her eligible for her sixth World Championships and third Olympics. She won the Saint Lucia National Championship with a height of 1.90 m. Along with Jeannelle Scheper, Spencer represented Saint Lucia at the 2015 Pan American Games. She won gold with a best height of 1.94 m. It was Saint Lucia's first gold medal ever at the Pan Am Games; the country had been represented at these Games six times since 1985 and then claimed the NACAC Championships title in San José, Costa Rica. At the World Championships, she again qualified for the final but there failed to show her potential, taking 12th place with 1.88 m.