The 20 year old man is due to appear at Letterkenny Circuit Court in October to be sentenced for another offence.
The man was arrested last night after a 19 year old woman was stabbed at a house on the Lough Road in Milford.
Gardai and an ambulance were called to the scene around 7.30pm after a ‘999’ call.
The woman was taken to hospital but her injuries are not understood to be life-threatening.
She is being comforted by relatives today.
The alleged attacker was arrested and is being questioned under Section 4 of the Criminal Justice Act.
It is still unclear as to the circumstances surrounding the attack.
The stabbing is the latest incident of knife crime in the county.
In an unconnected incident, father-of-two Darragh Harvey, 32, from Letterkenny needed plastic surgery when he was stabbed in the head, face and chest outside McCarry’s Bar in Letterkenny three weeks ago.
A man was questioned but released without charge in connection with that incident and a file is being prepared for the Director of Public Prosecutions.
The suspect failed to appear at Letterkenny District Court earlier that day and a bench warrant had been issued for his arrest.