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In recent years, the techniques of analytic combinatorics in severalvariables (ACSV) have been applied to determine asymptotics for severalfamilies of lattice path models restricted to the orthant $\mathbb{N}^d$ anddefined by step sets $\mathcal{S}\subset\{-1,0,1\}^d\setminus\{\mathbf{0}\}$.Using the theory of ACSV for smooth singular sets, Melczer and Mishnadetermined asymptotics for the number of walks in any model whose set of steps$\mathcal{S}$ is "highly symmetric" (symmetric over every axis). Building onthis work, Melczer and Wilson determined asymptotics for all models where$\mathcal{S}$ is "mostly symmetric" (symmetric over all but one axis) *except*for models whose set of steps have a vector sum of zero but are not highlysymmetric. In this paper we complete the asymptotic classification of themostly symmetric case by analyzing a family of saddle-point-like integralswhose amplitudes are singular near their saddle points.

Completing the Asymptotic Classification of Mostly Symmetric Short Step Walks in an Orthant