Getting lodged on a throw in is a violation.
Rule 9-2-8:
"The thrown ball shall not become lodged between the backboard and ring before it touches or is touched by another player."
I am presuming in your case it was not touched before becoming lodged. If it was, that is a different situation.
Presuming it was not touched, then there is a violation per 9-2-8. The penalty per rule is throw in for the other team at the original throw in spot.
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