Встретила это выражение как «третий лишний»
Сегодня оно тоже употребляется или есть другое выражение?
Спасибо

two's company, BUT three's none (/a crowd)

https://books.google.com/ngrams/graph?content=three%E2%80%99s+none%2C+three%27s+a+crowd&year_start=1800&year_end=2000&corpus=15&smoothing=3&direct_url=t1%3B%2Cthree%20%27s%20none%3B%2Cc0%3B.t1%3B%2Cthree%20%27s%20a%20crowd%3B%2Cc0

👍

two's company, three's a crowd (no BUT). I've never heard "three's more" in this expression (and neither has Ngram: https://books.google.com/ngrams/graph?content=company+three%27s+a+%2A%2Ccompany+three%27s+more&year_start=1800&year_end=2019&corpus=26&smoothing=3&direct_url=t1%3B%2Ccompany%20three%20%27s%20a%20crowd%3B%2Cc0

For some reason, the link to the Ngram isn't working. I'll post it as a note for you.

Ок, thank you

I've never heard "three's more" in this expression (and neither has Ngram

it was "three’s NONE" actually, that ngram did hear about. In the past it was more popular.

no BUT

тоже встречается, как и AND
https://www.google.com/search?q=%22but%20three%27s%20a%20crowd%22&tbm=bks&tbs=cdr:1,cd_min:1996,cd_max:2000&lr=lang_en
частотность я не сравнивал

For some reason, the link to the Ngram isn't working

These idiots made some stupid changes. Now you have to put the cursor to the end and press Enter

Grumbler, and in a lot of the examples that you posted, people are citing the second part of this expression and adding BUT as part of their discourse. Similarly, I could say ..., но правды, как говорится, в ногах нет. However, the integral form of the expression is в ногах правды нет. Similarly, the integral expression is “twos company, three’s a crowd“ and any alteration of this, is simply “poetic license.”

lot, but not all.
The full expression is even in a dictionary - with and without BUT - https://books.google.co.uk/books?id=AbJ1tVGmiTgC&pg=PA869&dq=%22two%27s+a+company%22&hl=en&sa=X&ved=2ahUKEwimkIiVh7rtAhWZQkEAHViFDKcQ6AEwAHoECAEQAg#v=onepage&q=%22two's%20a%20company%22&f=false

I understand, that it's possibly a thing of the past.
I don't remember how and what for I searched earlier today, but for some reasons there were many 'but'.

👍🏼

Grumbler, Uly, it's an interesting discussion. Thank you for your attention to the question!

You’re very welcome 😉