After completing the A Blade In The Dark quest in Skyrim, you will meet with Delphine to plan an infiltration of the Thalmor Embassy, thus starting the Diplomatic Immunity quest. When you get inside the embassy, pretending to be a party guest, you'll need to distract the other visitors to sneak out unnoticed to collect the items Malborn smuggled in and continue the quest. So this guide will teach you how to do the distraction in Thalmor Embassy in Skyrim.