Hi I have a 3 year old daughter who is a restless sleeper, snores, talks in her sleep and always sleeps in weird positions could she have sleep apnea?

Yes. A 3 yo that snores will likely develop sleep apnea within a year or so if she hasn't done so already. I would schedule a visit with an ENT and bring a recording of the sleep sounds. A sleep study may or may not be needed when this is reviewed. Good luck.