Jamaica face Curacao in their final group-stage fixture at the 2019 CONCACAF Gold Cup on Tuesday.
El Salvador sit level on four points with the Reggae Boyz in Group C entering Matchday 3, and they take on eliminated Honduras while hoping to round off an unbeaten pool campaign.
Jamaica will qualify for the quarter-finals as long as they avoid defeat against Curacao, who beat Honduras 1-0 on Friday to collect their first win in the tournament. Curacao can still qualify for the knockout stages, but they must not lose and will need some help from Honduras.
La Bicolor can no longer advance to the next round of the competition, but a win of two goals or more over El Salvador in their farewell fixture could still prevent La Selecta from qualifying.