for this ultimate team competition, you need to have a squad and subs, with a total of 3 nationalities. For example, 4 players may be English, 7 may be Spanish, and the subs may be French. (Hope this makes sense!) But in order to enter the competition, you must have exactly 3 nationalities in your squad. However: if you feel you can't organise your team like that, you can forfeit the season (it won't relegate you so don't worry) and you can chose another competition which you think may be able to organise better.