diff --git a/packages/features/bookings/lib/getBookingResponsesSchema.ts b/packages/features/bookings/lib/getBookingResponsesSchema.ts
index a2357ca243..3045bc1977 100644
--- a/packages/features/bookings/lib/getBookingResponsesSchema.ts
+++ b/packages/features/bookings/lib/getBookingResponsesSchema.ts
@@ -236,7 +236,7 @@ function preprocess<T extends z.ZodType>({
         }
 
         if (bookingField.type === "phone") {
-          if (!(await phoneSchema.safeParseAsync(value)).success) {
+          if (!bookingField.hidden && !(await phoneSchema.safeParseAsync(value)).success) {
             ctx.addIssue({ code: z.ZodIssueCode.custom, message: m("invalid_number") });
           }
           continue;