Name the regular season for usisl d-3 pro league did not qualify
CREATE TABLE "year_by_year" (
  "year" real,
  "division" real,
  "league" text,
  "regular_season" text,
  "playoffs" text,
  "open_cup" text
);
SELECT "regular_season" FROM "year_by_year" WHERE "league"='USISL D-3 Pro League' AND "playoffs"='Did not qualify';