Highly-rated Baleba was linked with Manchester United this summer but Albion have never had an intention to sell him in the current window .
United’s poor start to the new campaign has prompted fresh speculation Ruben Amorim may come back in with a big-money offer.
The Argus have reported consistently that Baleba will not be sold until next summer at the earliest.
But that has not prevented questions coming at Everton last Sunday and now ahead of the visit of Manchester City.
Asked whether he was 100 per cent confident Baleba would stay, Hurzeler told a press conference: “Yes. If there is a number more than 100, I would even say more than 100. I am confident.”
Two weeks ago, before starting the season against Fulham, Hurzeler had told a press conference in the same room at Lancing he was "very, very, very confident" Baleba would be staying.
Nine days later, after the 2-0 defeat at Everton, he told another reporter he expects Baleba to stay.
The Seagulls host Manchester City on Sunday fresh from a 6-0 midweek victory at Oxford in the Carabao Cup where summer recruit Stefanos Tzimas struck twice.
Hurzeler is unsure if more additions will follow, though, during the final days of the transfer window.
“I have a feeling that sometimes it is not so clever to share always the feeling you have in public but overall I am very happy with the squad,” he explained.
“I have daily exchange with Tony (Bloom), with Paul (Barber), with David (Weir), so overall I’m very pleased with how the process went so far and let’s see if there might be any more changes.”