Earlier, Mercedes chief Toto Wolff said the Spaniard could not be ruled out for 2018, but pointed to Alonso’s historically problematic character and past run-ins with Lewis Hamilton.
Alonso, 35, has said he might be on the move at the end of the year, as his three-year contract with struggling McLaren-Honda finally runs out.
But Mercedes team chairman Lauda told the Swiss newspaper Blick: “He (Alonso) is certainly not on our wish list.
“We are fully satisfied with Hamilton and Bottas. But as my partner Toto Wolff has said: never say never,” the great Austrian added.