When a Spell/Trap Card is activated that targets exactly 1 Zombie monster on the field (and no other cards): Negate the activation, and if you do, destroy it.
Rulings
Individual Card FAQs
You cannot activate "Tutan Mask" to negate a Spell or Trap Card that targets a Zombie-Type monster in the Graveyard or Deck (such as "Monster Reborn").
You cannot use "Tutan Mask" to negate a Spell or Trap Card that targets a face-down Zombie-Type monster.
Trap|
Counter