Are there children involved? If so, that needs to be priority for her.
If not, can you let her stay with you for a bit?
When I was in her situation abroad, my friend invited me to move back to US and stay at his house. That's what gave me the courage to leave.
She needs baby steps. She needs a place of nurturing without pressure until she has strength to take the second step.
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A THOUSAND TIMES YES to what babybug said. Those three sentences are what it comes down to in a nutshell.
The starting over part is hard and scary enough without being near a mental breakdown. Nasty divorces leave their mark on the best and most stable of us. People do reach their limits and it takes a while to sort yourself out. I went through something similar when I was 48, arrived with two suitcases and started over in the US. It can be done with a little help to get settled and with a place to stay. It took me an entire year to become fully functional again.
Her best bet is to return to the US and recoup her sanity - slowly - on her own. Unless she's a Vet who can get help with PTSD through the VA I don't know of a single helpful program in the US.
First, solve the issue of housing. Could you have her stay with you say for one month during which you help her get things like a basic cell, food stamps, paperwork like DL and a bank acct. Basic settling in kind of stuff that most likely will be hard to deal with for her.
Go with her to appointments, she needs you to steer her and very important, follow through and follow up - very difficult to do when you're in a dark place.
Money - housing is critical.
The second month - is it possible for her to get an efficiency apartment in your area that she could afford if you pitch in with the rent for say three months?, or pay her first and last and 50% of the rent for two months, until she has a job? while she builds up a bit of strength and finds a low-stress job?
From my own experience, I can tell you that it was healing and critical to have a place of my own, where you can just shut the door. It was exactly that fear of losing my apartment and knowing that there was no way I could find the money to pay first and last month of rent, never mind deposit on utilities is what kept me (barely) functioning.
I knew if I could just manage to hold on to my place and slowly build my life I just might be OK.
Incredibly helpful to my "recovery" if you want to call it that was having a balcony where I could just sit in the sun, drink coffee and do nothing. Just looking at the trees swaying in the wind was soothing and all I wanted, needed and could handle.
I was lucky enough to be within walking distance of a grocery store, (a mile one way) thrift stores and a bunch of small shops as well as a bus stop. Needing groceries got me out of the house and later when I felt better I'd hang out at the Thrift store...
Time heals - even if it doesn't feel that way while you are going through turmoil.
You sound like you are ready to throw her a lifeline - if she's ready and desperate enough she'll take it. You can only help and support if she wants it and is ready and able to do her part.
There is a new and wonderful life waiting for her if she decides to go for it.