Can counsellors/psychologists tell you if you have depression or anxiety?

Depression / anxiety: A provider who is a diagnostician can help to determine if you have anxiety or major depression. Psychologists, psychiatrists & many physicians are able to make these kind of diagnoses. Some counselors can too - or they aren't diagnosticians they can refer to another provider. If you believe you need a little help - try it out. It can improve the quality of your life. Take care.

Yes: That is exactly what psychologists do.