Does it make sense to say an aircraft has an attitude of 3° or that it has a flight position of 3°?
Actually most of the time when referring to "attitude" we are talking only about pitch attitude.  You can call bank angle "roll attitude" but it's more typically called "bank angle" in common usage.   If I have an airplane in a turn and I'm descending, you can just say my attitude is too low and I need to raise it, and I won't be confused as to whether you're referring to pitch or roll and will know I need to increase pitch attitude.

So 3 degrees of flight attitude would clearly, to me at least, refer to flight with the airplane's pitch attitude 3 degrees above the horizon while in level flight (or turning for that matter), not climbing or descending, which sounds like a pretty typical number.