Citizens of the Republic of Serbia require a visa to enter the State of Qatar. The application for an e-visa can be submitted via the website www.hayya.qa or through the mobile application of the same name.
Quoted from the source.
Before you go
The conditions that come with this rule, from its official sources.
Conditions from official sources
Needs proof of accommodation: a hotel booking or a host registered on Hayya.
Needs a return flight ticket.
Holders of a valid US, UK, Canadian, Schengen, Australian or New Zealand visa or residence permit can apply for the Hayya Visa with ETA (A3) instead.
Holders of a valid GCC residence permit can apply for the Hayya GCC Resident Visa (A2) instead.
Passport validity
Your passport must be valid for at least 3 months.
Passport valid for at least three months
Tourist entry only
These rules cover tourist visits. Work, study and transit follow other rules.
The other way round
What Qatar passport holders need to visit Serbia.
Qatar passport Serbia
Visa needed
For holders of ordinary passports and other travel documents: Visa required