Citing academic overload, this resignation letter is intended for overworked interns.
{Your address}
{City, State, Zip}
{Date}
{Recipient}
{Address}
{City, State, Zip}
Dear {Name},
I am writing to officially resign from my internship with {company}. I am struggling with my courseload as it is, and the internship is becoming too much for me to handle successfully.
I appreciate the opportunity to attempt this internship this {semester/quarter}, and I hope I am not causing you too much trouble by leaving the position.
Sincerely,
{Name}