Under FIBA rules, the moment a shot strikes the rim the ball is live and any player may touch it. A defender can swat it off the iron, an offensive player can tap it in, and neither is a violation. That is the single biggest rules difference between international basketball and the WNBA or NBA.
| Situation | FIBA | WNBA and NBA |
|---|---|---|
| Ball on downward flight, still has a chance | Violation | Violation |
| After the ball strikes the rim | Legal for anyone | Violation if inside the cylinder |
| Reaching up through the net | Violation | Violation |
| Ball resting on the rim | Playable | Basket interference |
| Free throw | Must hit the rim before anyone crosses | Same |
What the Cylinder Rule Is, and Why FIBA Does Not Have It
In the WNBA and NBA there is an imaginary cylinder rising from the rim. While the ball is inside it, nobody may touch it, and that stays true even after the ball has bounced on the rim. FIBA has no cylinder. Contact with the rim ends the protected phase of the shot entirely.
The practical effect is that international games reward tall players who hover near the basket. A big who times a bounce can knock away a shot that would have dropped, or finish one that would have rimmed out.
What Is Still Illegal
The rules are not a free for all. Touching the ball on its downward flight while it still has a chance to go in remains goaltending under FIBA, exactly as it is domestically. Reaching up through the basket from below is also a violation. What changed is only what happens once the ball has made contact with the iron.
Why It Confuses American Viewers
This is the rule that produces the most shouting at televisions during World Cup and Olympic games. A play that looks like a blatant goaltend by domestic standards is simply a good defensive play internationally, and no whistle comes. Nothing has been missed. The rulebook is just different.
The Bottom Line
Downward flight is protected. The rim is not. Once the ball touches iron in a FIBA game, everybody can play it.