Hawks went down to their second consecutive league defeat, but it could have been so much different.
Diss completely dominated the first 30 minutes of the game, but all they had to show for it was a Jack Glen goal after a Matt Munnings cross.
Other opportunities came and went, and the home side paid the penalty when Norwich Utd scored three quickfire goals to end the half.
An early second half goal for the visitors put paid to any comeback hopes for Hawks, and the game petered out into a scrappy affair.
Full Time 1-4, the best 30 minutes of the season so far for Diss was undone by a mad three minutes at the end of the first half, when the physical approach of the visitors paid off.
Next week, Old Catton away, ko TBA.