Can I pray qaḍāʾ (missed prayers) after Asr?

Yes. The restriction after Asr concerns voluntary prayer, not obligations: a missed prayer may be made up after Asr in all four schools. The one caveat is the end of the day. In the Ḥanafī school, once the sun begins to yellow (isfirār, roughly the last twenty minutes before Maghrib) qaḍāʾ becomes invalid until the sun has set, with a single exception: that same day's unperformed Asr must still be prayed even then. In the Shāfiʿī school, prayers with a cause, including qaḍāʾ, remain valid straight through. Check your own moment below.

Rulings differ by madhhab and by what you intend to pray - the live answer below is conditioned on both. Draft pending scholar verification; see the methodology.