Outline.18 is a tiny fragment identified by Jürgen Lorenz in October 2025. Its preserved portions partially describe DAY 2 and DAY 3 of the nuntarriyašḫa- festival.

The tablet has not been edited previously.

Outline.18 exhibits a handwriting reminiscent of Outline.7 and perhaps Outline.14; its signs show a forward slant and are not very deeply impressed into the clay, producing wedges of notably ‘thin’ appearance. This feature is also observable for several paragraph lines, which are much thinner than on the other tablets of this group.

Any potential join with another outline would necessarily be indirect. For that reason, Ouline.18 is treated as an independent outline tablet.