Maybe. I'm not sure that the answer is a clear yes/no.
I suppose that it is POSSIBLE... but on the other hand:
a) I know of no reason why shellfish would be involved in rice production, harvesting, or packaging, and
b) I have never encountered a plain rice which has given me a problem.
Now, I fully concede that it's possible that I'm allergic to an atypical crustacean protein or something like that, which would make this particular set of anecdata useless... so.