3. (8 points) In a football team, 11 players are on the field, including 1 goalkeeper who does not participate in the formation of defenders, midfielders, and forwards. It is known that the number of defenders is between 3-5, the number of midfielders is between 3-6, and the number of forwards is between 1-3. Therefore, according to the number of defenders, midfielders, and forwards, there are $\qquad$ formations.
【Analysis】The number of defenders is between $3-5$ people, and we can classify and discuss according to the number of defenders, list all possibilities, and thus solve the problem.

【Solution】Solution: Formations are generally arranged in the order of the number of defenders, midfielders, and forwards. When the number of defenders is 3, the formations can be: $343, 352, 361$, 3 types; When the number of defenders is 4, the formations can be: $433, 442, 451$, 3 types; When the number of defenders is 5, the formations can be: 532, 541, 2 types; $3+3+2=8$ (types)

Answer: There are 8 formations.
Therefore, the answer is: 8.