The 28-year-old has attracted growing interest ahead of the January transfer window, but according to AS, Sporting have no intention of negotiating his departure.
The Lisbon club are aware that Suárez is being monitored by several leading European sides and have chosen to refer interested clubs directly to the release clause.
Newcastle United are among those to have shown interest in the striker, having pursued a deal during the summer without reaching an agreement.
The Magpies remain attentive to Suárez's situation as they look to strengthen their attacking options. Nottingham Forest are also monitoring the forward, according to Fussball News.
The continued Premier League interest is understandable given Newcastle's current options, with Yoane Wissa identified as the only specialist striker in Matthias Jaissle's squad.
Sporting, however, are not currently considering a negotiated sale. Their position is that Suárez's €80 million clause must be paid in full if he is to leave during the next transfer window.
That stance gives the Portuguese club complete control over the situation while ensuring that any potential January move would require a substantial commitment from one of his suitors.
For now, Sporting's message is straightforward: interested clubs can pursue Suárez, but there will be no discount on the €80 million required to release their leading striker.