Abandonment

No, we don't in the UK, not in quite the same way as in the US. Therapy here comes under the NHS, which is state funded, so we don't pay for it directly (but we do in our taxes). It's called IAPT, more info here IAPT |. Or we can get it via our employer, otherwise known as occupational health (private or public sector). Or pay for it ourselves. You tend to find a greater correlation between those that pay directly and stick with therapy/ are more specific about their needs. And the quality is more variable, accordingly. I now fund myself and have the best therapist ever. I have been tempted to stop as we are getting into the difficult stuff now, but I would not abandon the process or her. I deal with that feeling in therapy. If I was to take a break or finish completely, I would hope I would be mature and professional enough to tell her why. And leave the door open.

I have not been abandoned by a therapist and I don't think a client can make a therapist feel abandoned. I have left therapists that were not a good fit or where toxic but I only saw them for five or less sessions.

I'm thinking about feeling abandoned rather than being abandoned here.
I felt abandoned in a sense by T1 when he moved the boundary goalposts. In reality he didn't literally abandon me. (I felt similarly about my mother actually.)
In terms of what you mentioned about a particular client filling a therapist's needs, I think I may have done this for T1, and his unsolicited contact recently makes me wonder if he felt abandoned by me when I left him. Again, I am talking about feelings of abandonment, not actual abandonment. I didn't abandon him because I have no obligation to him at all.
So in the sense of feeling abandoned, probably yes both ways. In terms of actual abandonment, no.

I used to live in an English-speaking country in Europe, and my therapist had to end prematurely with me. I did not use the word "abandoned" but he did- i forget precisely what he said, but he used the word abandoned and indicated that he felt that was what he was doing to me. I was ok about it, however, though it was sort of helpful to see he felt bad about it.

The question of whether a client may or may not actually abandon a therapist is kind of less interesting to me than whether a client feels she or he has abandoned a therapist. I think that's an intriguing issue- how the client might feel that they are abandoning the therapist. And I do think it's entirely within the range of possibility that a therapist would feel abandoned by a client.

I've been abandoned once, for calling the Psychiatrist who did therapy (no meds), a JERK! I consider it more of a "firing" by the doc. The other, that I always thought was abandonment wasnt as I think more about it. So, as painful as some of the endings were they were actually unilateral terminations (x2), and rational me understands them.