In a joint statement with chief executive Stephen Booth, he said: "There will be no discussions on any takeover until after the last match of the season (away at Dagenham on 3rd May).
"The focus now must be firmly on the next three games and keeping the club in the Football League."
Mr Haslam, who is out of the country on holiday, spoke out after it emerged on Monday morning that businessman Colin Hancock is among those wanting to buy the club.
Mansfield Town says it has also released the statement to end the frenzy surrounding the controversial entrepreneur John Batchelor, who has launched a high-profile publicity campaign in support of a bid to buy the Stags in recent weeks.
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