Ok, thank you all for your replies.
There is no update. He has been blocked.
But perhaps tell you about our 3 date, which lasted approximately 2 hours.
It was a dinner date, he booked a table, then asked me if I had any allergies, to which I said yes, I am allergic to salmon, shrimp, lobster, (fish in general).
At the restaurant he had pre ordered a 3 meal course when he did the booking, a starter that was shrimps and salmon type starter. When he asked me why I did not eat any of it, he was like " oh yeah now I remember, sowwy? Then the main meal came and I was unable to finish my whole plate, so he took what was left off my plate and ate that. The convo during the meal was politics and his wife. Also repeatedly asked me if I could translate his university course work for him so he would not fail the course. We are both in our 50s, not teens or young adults.
Now after I arrived home I thanked him for the meal and said good night. This was Saturday evening. All very polite and nice. As you do.
He then texted me a couple of times on Monday afternoon asking for a 4th date, and would I care to go zip lining with him. I declined, he knows I have a heart condition so this was not something I was able to do, clearly not listening to me at all during our dates, by this point I realise he had ordered food I was allergic to and then suggesting zip lining, and this is where I sent the text to explain that I was not going to take things further.
The message I sent him, which I am fully entitled to do btw, that this was not for me, text sent at 17:22pm Monday.
Then a couple of minutes after my text he sent me over 50 messages in the space of an hour, called twice and then kept texting even when I sent him a text to say I was in a call to family. Dad has cancer so was talking to mum about him, yet he kept at it refusing to acknowledge that I was unable to talk.
Now by this point I did not feel this needed to be discussed further as I realised he was showing alarming behaviour. After knowing him for 6 hours, met 3 times, over three Saturdays, this just gave me the ick. I do not need to set up a 4th date to explain its not for me. And clearly I did the right thing seeing how unhinged he is. The context in his texts was really concerning too. Its not flattering, reading over them afterwards, I know I did the right thing.
This man has been blocked. And for the etiquette police on here whether this is right or not to send a text after 3 dates to call it quits, chill, the man will recover, I AM NOT RESPONSIBLE for him and certainly not that co dependent either, and thankfully that is mine to decide, not anyone else´s. I knew this man for less than a work day. But my message to him was kind and polite, just in case I was to bump into him sometime.
A man that obsessively sends over 50 texts, calls, then tells me that he will send me documentation, discussions between him and his wife, is just not on, its weird. Really odd.
I am really grateful for all the replies, have a fabulous day everyone.