Hatırlamasam. If I remember.

Unutmasam. If I don´t forget.

Unutmasan. If you don´t forget.

Thank You

Tunci thanks

I think you forgot the letter "z"

 Hatırlarsam = If I remember

Hatırlamazsam = If I don´t remember

Unutmazsam = If I don´t forget

Unutmazsan = If you don´t forget

marian tahnks

here the difference:

Hatırlamasam - May I not remember. (wish)

Hatrlamazsam - If  I don´t remember

 Agree.

Gökuyum which would be more usual to use:

Hatırlamasam

or

Hatırlamayayım

Hatırlamasam is a wish, hatırlamayayım is a will. But hatırlamayayım can also be used as an order. Because we don´t have an imperative mood for "ben" in Turkish.