Tips for explaining to parents that their child does not have autism

I have been having a examples of parents almost seeming disappointed when I tell them their child does not have autism. I usually explain that their kid does have some odd/weird behaviors and is a little quirky, but usually their social skills are excellent and they maybe get like a 3 on the ADOS-2. Usually the kids (often minor) behavioral challenges are behavioral or better explained by ADHD, lowish/borderline IQ, anxiety, etc. It's annoying because it should be GOOD news.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Psychology [Psy.D. / Ph.D.] Source Type: forums