The three players are asymptomatic and are fulfilling the necessary isolation period. Luís Neto and Nuno Mendes are regular players in the first team.
The players will no longer be available to take part in the game with Rio Ave, from the 14th round of the Portuguese Football League.
Sporting, leader of the championship, with 35 points, will play at home on 15 January against Rio Ave, 10th, with 14 points, at José Alvalade stadium, at 6:30 pm.
On Tuesday, Sporting will face FC Porto in the semifinal of the League Cup, in a match that will be held in Leiria.