Sure. You are worried about her and can open a dialogue with a professional. You can start by consulting a clinical psychologist to be able to have more space to talk and not start medications at the beginning itself.  Inform your wife about it and let her be around during your visit/ online consultation so that she feels confortable. She may be willing to take part eventually as well.

Hi You are worried about your wife. You can consult a psychologist on her behalf.

You can consult a psychologist on behf if her and later she can visit them..

Wellness greetings to you Allow your wife to read the testimonials and the details about the doctor who you want her to consult. Arrange an initial phone call with the doctor and make sure she is feeling comfortable. Everyone want someone to help them at the times of their low if she is taking account ability for initiating this it will be greatly helpful for her and you as well

Hi.. Yes, you can consult a Psychiatrist or a Psychologist alone if she is unwilling. Please keep her parents informed and involved, it is important from medico-legal point of view. As a spouse you can initiate treatment on her behalf but only if she is clinically diagnosed with an acute condition which limits her ability to manage her own treatment. Remember, even if a person is mentally ill s/he still has rights to choose their treatment, as per mental health laws. Anyone found manipulating with their rights, be it a spouse, family member, colleague, boss, friend, or even the medical professional/ institution is punishable under mental health laws.

You can try..but dr will not be able to prescribed  medicine  without connect with patient.