What are the chances that you go on three interviews with a company, and then decline their job offer?

Yes, I've seen it happen twice.
1st time, when I applied for a job, they said that the position had been filled. Then I got a call that night, and the guy that was offered the job, turned it down.
Same thing happened to my son, but they didn't hire him, they hired another guy...🤔go figure.

Yeah if you're having three interviews with one company then chances are you're having three interviews with other companies too to increase the odds of getting a job. Then you reject one to select one.

That happened to a new potential manager in my last job. They got him for the third interview as they really wanted him, but he turned it down as he got a better offer.

Happened to me once, each time was with a team leader & HR member. After being rejected I asked for feedback, the HR member from the 2nd interview called & wasn't aware I had 3 interviews!

We’ve had people do that to us. Pisses me off to no end. I swear they just used the process to negotiate their current job.

It happens when you have more than one opportunity knocking your door.

You mean three rounds of interview? I don't have so much of Patience 😁