No. Burundi doesn't ask visitors to fill in an online arrival form (also called an entry form, immigration card or landing card) before they travel. An online information form is filled in on arrival at Bujumbura airport via a QR code; it cannot be completed in advance.
Do I still need a visa for Burundi?
An arrival form is not a visa. Whether you need a visa or an electronic travel authorization depends on your nationality, so check Burundi's official immigration website or your own government's travel advice.
Other countries in East, Central and Southern Africa