is the FIFA rule about a player being unable to play for three clubs in one season in the game?

have had scout reports saying that a club is unlikely to sell as they've only just bought a player but no mention of any rule.

I think it is yeah.
Remember when trying to sign a player something like "transfer can only go through on ...whatever date... as player has already been transferred twice this term"

Yeah, there is a rule along those lines.

But it should contain the clauses "unless mascherano" and soon, maybe, "unless Cousain" because as with most fifa rules, all the clubs need to do is sulk and it goes away....

Hasnt Diarra played for three this season? Chelsea in the charity shield, Arsenal, now portsmouth.

i thought the ruling was about moving clubs rather than playing for clubs
in diarras case, he was sold by chelsea and then arsenal, therefore two moves. thats how i had understood it, but i'm probably wrong.

Charity Shield isn't an official match.