3 verses have
suddenly
in Edition Clear Qur'an by Talal Itani / Al-An'aam (The Cattle)

6:31Losers are those who deny the encounter with God. Then, when the Hour comes upon them suddenly, they will say, “Alas for us, how we have neglected it.” And they will carry their burdens on their backs—evil is what they carry.

6:44Then, when they disregarded what they were reminded of, We opened for them the gates of all things. Until, when they delighted in what they were given, We seized them suddenly; and at once, they were in despair.

6:47Say, “Have you considered? if God's punishment descended on you suddenly or gradually, would any be destroyed except the wrongdoing people?”