If you dream of being uninvited to a party, it means in waking life, you feel excluded. This may be a real issue, or self perceived thought. If you feel that you don’t belong to a certain inner circle, you will feel suspicious that you’re excluded in their social gatherings.
If in waking reality you’ve been discriminated against, then this theme can continue into your dreams. You might conjure up dream imagery of being uninvited and unwanted.