What is the ruling on making up voluntary prayers?

The questioner : The Sunnah prayer. After its time has passed?

The Shaykh : If the Sunnah prayer is missed without any effort on his part to delay it, it is permissible to make it up. However, if he intentionally delayed it until its time passed, it is not made up. Did you understand?

The questioner : I mean, for example, if he had an excuse?

The Shaykh : Yes, for example, he entered the mosque and the prayer was already being performed, and he had not prayed the pre-Fajr Sunnah, so he prays it afterwards. But if he delayed intentionally, saying, "I do not want to pray the Sunnah," and then entered the mosque, prayed the obligatory prayer, and then forgot to pray the Sunnah, he does not pray it.

The questioner : Does he pray the post-Sunna prayer until 'Asr comes?

The Shaykh : The time continues with him.

The questioner : The 'Asr adhan was called and he did not pray it?

The Shaykh : Why did he not pray it? Intentionally?

The questioner: Yes.

The Shaykh : I got the answer; he does not pray it.

The questioner : If he had an excuse, he prays it, my master?

The Shaykh : Yes, exactly.