The phrase "a third facet of" is correct and usable in written English.
It can be used when discussing different aspects or dimensions of a topic, particularly in analytical or descriptive contexts.
Example: "In this study, we will explore a third facet of consumer behavior that has been largely overlooked in previous research."
Alternatives: "an additional aspect of" or "a further dimension of".
United States v. Bank of New England, N.A., 821 F.2d 855, 855 (1st Cir. 1987) ("[I]f Employee A knows one facet of [a legal] reporting requirement, B knows another facet of it, and C a third facet of it, the bank knows them all". (quoting and approving jury instructions given at trial)).
Within the past few years, a third facet of translational research has been identified and integrated into translational medicine discourse.
Pancho Villa may not be directing any of the spots, but his likeness does show up in a second facet of the campaign where the agency, Wing, advertises itself.
Although "there's not a lot of face-to-face contact," a second facet of the AL's role is to give tutorials, in person, at the regional or study centres.
A second facet of the symptomatology of Lemierre's syndrome is the presence of hypercoagulability, resulting in thrombophilia.
A second facet of our analysis pertains to the alternative license allocation scenario identified using the spatial model.
A related, third facet of our research was a search for patents that referred to C. elegans.
In a third facet, I argue for high-level representations of uncertainty, such as probabilistic programs, probabilistic databases, and statistical relational models.
Further experiments are directed for reaching a generalized method towards the analysis of a bigger variety of NPs covering the trending topic third facet of the analytical nanoscience and nanotechnology.
On a third, faceted category we observed an alternating conformation of HPF on neighboring facets.
The first facet of Dylan in I'm Not There is Woody, a young black kid (Marcus Carl Franklin) riding the boxcars with ageing hoboes, visiting the dying Woody Guthrie, jamming with old blues singers.
