Is Nectar a Serbian brand?
Yes. Nectar is a Serbian brand.
company: Nectar d.o.o., Kiš Ernea 1, 21000 Novi Sad; factory Novosadski put 9, Bačka Palanka
why it is listed
Nectar’s own contact page names Novi Sad (Kiš Ernea 1) as the seat, with further sites in Beograd, Bačka Palanka and Arilje; the registered fruit-and-vegetable processing entity is in Bačka Palanka, PIB 101922265.
Source: nectar.rs
Local alternatives
Since this product is registered with GS1 Serbia, here are some Kosovo/Albania alternatives in the same category:
Frutomania
MOEA, Gjilan — Kosovo
MOEA grows fruit on ~400 hectares in Kravarica near Gjilan and cold-presses it into 100%-fruit Frutomania juice with no added water or sugar; sources from over 400 Kosovo contract growers.
Reported pairingSource: fondikgk.org
Reported pairing: telegrafi.com
Frutti
Frutti sh.p.k., Reçan, Prizren — Kosovo
Frutti’s own "Rreth nesh" states the company was founded in 2000 in Prizren, based in the village of Reçan; it bottles fruit juice in 200 ml glass, 250, 330 ml and 1 L.
same categorySource: frutti-ks.com
Reported pairing: frutti-ks.com
What this means — and what it doesn't
A GS1 prefix only shows which organisation the barcode owner is registered with — not necessarily where the product was manufactured. The real place of manufacture is on the physical product's "Made in" label.