Joey Bada$$ Says Disney Wouldn't Let Autistic Cousin In Without Mask

Joey Bada$$ has a bone to pick with Mickey and co. -- he claims the Mouse House wouldn't let his autistic cousin into the park without a mask ... to which he calls foul.

The rapper posted a video Saturday which shows three Disney World employees on camera who appear to have been dispatched to deal with a situation. As Joey narrates and gets the names and positions of each worker ... it becomes clearer what's going on.

He says he came to DW with his family -- about 30 people or so -- to celebrate his daughter's birthday. Thing is, one of his relatives is an autistic child ... whom Joey says doesn't understand the concept of mask-wearing and finds it suffocating.

Joey adds, "These guys have completely ruined my family’s trip. We came out here 30+ for my daughter's bday and they turned my lil cousin away, can’t even enjoy this experience anymore" ... going on to tag a number of Disney handles on social media.

We checked Disney's official policy on mask-wearing in their parks that are open -- which, at this point in the States, is only in Florida -- and aside from kids younger than 2 years old ... there are no loopholes for the rule other than eating/drinking, which is standard.