I flagged one of these comments but my flag was declined.
In my honest opinion, a repeated comment (esp. from the same user) on the same question is "too chatty".
I believe that I could flag all 3 of them, or flag one with a custom message that tells the mod that this is too chatty if you take the other 2 comments as well, but I believe this is something that you have to check anyway if a comment is flagged as "too chatty".
I could also use the "not constructive" flag (It does not add extra value), but "too chatty" fits also well, because it just tells in a very high noise/value ratio that the OP needs some help.