When writing about points or scores, I prefer digits to words.
If we accept that there is no problem with "a score of 3"
a score of 90%
a score of 3–2
He had an IQ score of 120
Source: Longman Dictionary
Then something that scores 3 stars, is perfectly fine
When the context is clear, such as a restaurant, book or movie review, the grade refers to a score, which can be anything: badges, stars, chef hats etc.
- I rate it a 3 out of 4 stars
In other words
I rate this book a 3 [out of 4 stars]
This book has a [score of] 3 out of 4 stars
If the determiner e.g. this is used with one noun, another determiner can be used with a different noun or plural noun phrase in the same sentence. For example,
- The match ended in a draw
- My house had a market value of $700,000
- That table costs a whopping 4,000 euros