If it does represent a spinosaur, Camarillasaurus would be one of several spinosaurid taxa known from the Iberian peninsula, the others being Iberospinus, Protathlitis, Baryonyx, Riojavenatrix, and Vallibonavenatrix.

[3][1] In their 2014 description of Camarillasaurus, Sánchez-Hernández & Benton considered it to be a basal ceratosaur, filling in a "gap" in the known diversity of the clade between the Late Jurassic Limusaurus and later "mid"-Cretaceous taxa.

They tested its phylogenetic position using a ceratosaurian dataset, and recovered the following results:[2] Limusaurus Camarillasaurus Spinostropheus Elaphrosaurus Ceratosaurus Velocisaurus Genusaurus Noasaurus Laevisuchus Masiakasaurus Abelisauridae However, in an abstract presented at the 2019 conference of the European Association of Vertebrate Palaeontologists, Oliver Rauhut and colleagues suggested it was more likely to be a member of the Megalosauroidea—likely the Spinosauridae—rather than a ceratosaur, based on characters of the posterior caudal vertebrae and newly excavated material at the type locality.

[5] The 2021 description of the Wessex Formation baryonychines Ceratosuchops and Riparovenator by Barker et al. recovered Camarillasaurus as the basalmost member of the Spinosaurinae, further supporting a non-ceratosaurian classification for it.

[6] In the 2023 description of Protathlitis, Santos-Cubedo et al. recovered Camarillasaurus as the basalmost member of the Spinosauridae in their phylogenetic analysis, outside of the Baryonychinae/Spinosaurinae split.