The phrase "awkward because of" is correct and usable in written English.
It can be used to describe a situation or feeling that is uncomfortable or clumsy due to a specific reason or factor.
Example: "The conversation became awkward because of the unexpected silence that followed his comment."
Alternatives: "uncomfortable due to" or "clumsy as a result of".
We were good friends now and I didn't want her to feel awkward because of some "drunken, experimental whim".
The observed stress jumps at the transition corner are compared with the predicted stress jumps; the comparison is awkward because of the difficulty of establishing accurate values of the mobilised angles of internal friction and wall friction.
Flax enthuses about the recording process: "We didn't have to give them any direction, and I think they felt awkward because of that.
Del Rio was the first N.F.L. coach to be fired this season, and while the move was expected, Weaver acknowledged that the timing was awkward because of the concurrent announcement of the team's sale.
What should have been, and was, charming and lovely – children not indoors playing computer games but out being creative, bold and friendly – was awkward, because of the world today.
This is slightly annoying as I think they look a bit awkward because of this, but who knows, maybe I just have a oddly shaped face.
While there are currently glasses for people with AMD, they tend to look awkward and cumbersome, because of their mounted telescopes, and can interfere with social interaction.
As the title of this poetic fantasy intimates, that meeting is a bit awkward because one of the parties happens to be dead when it occurs.
Sometimes the resulting compromises will be awkward because proponents of legislation must accept half a loaf.
It's a little awkward, because part of Peggy imagines that her experience is similar to Dawn's, but it goes well enough till she notices that she is about to leave her purse containing the loot she's liberated from Roger near her black house guest.
Awkward, because the subject of Calderon's drinking was never specifically mentioned.
