My son is 3 and has pdd-nos. he scripts from tv shows sometimes but uses it mostly in context. is this considered echolalia?

Most likely: It sounds as if you are describing a form of echolalia-or repetition of words or phrases spoken by another. The face that is it 'mostly in context' makes it subject to interpretation. Have you discussed this with his doctor? Providing a recorded or written narrative of his speech could illustrate your son's speech and make it easier for the doctor to answer your quetion.

PDD-NOS is an out-: dated diagnosis, now Autistic Spectrum Disorder 1 in the DSM-V. Scripting is delayed echolalia. Used to communicate needs, desires or feelings, it's a step toward social communication. An evaluation by your school district's Child Find Team should confer eligibility for Early Childhood Special Education. If possible, augment this with private ABA, Speech/Language & Occupational Therapies.