The Russian billionaire has seemingly not attended a home match since the spring of 2018 after taking Israeli citizenship following troubles renewing his visa in the UK.
Abramovich has scrapped plans to build a new 60,000-seat stadium, but Buck insists Abramovich is not interested in offloading the club.
“So far as I know, absolutely not; to the contrary. I have never heard a word from Mr Abramovich: ‘Let’s get this ready for a sale,’ or something,” Buck told the Guardian.
“Because of the political situation, there are people who think they might want to buy Chelsea Football Club at a bargain. We do get enquiries and we really have nothing to say to these people.
“In terms of being involved, in looking at new players, talking about whether to extend players’ contracts, do we buy this player, do we sell this player, (Abramovich) was always intimately involved in that from day one and is just as intimately involved now.