Seeing the others' answers I don't think matters in this solution.
The strategy -- given that it's allowable to discuss strategy before drawing cards -- is each person has a different modulo result (x) they have to compute the number they must add [to the sum of the other three], (m) in the following algebra. Solve for m to get the suit your should guess.
x = ([sum of others] + m) % 4
Suits: 0: Diamond 1: Heart 2: Club