CREATE TABLE table_203_371 (id DECIMAL, "round" DECIMAL, "opponent" TEXT, "result" TEXT, "bro." DECIMAL, "opp." DECIMAL, "date" TEXT, "venue" TEXT, "crowd" DECIMAL, "position" TEXT)

the round after round 3
SELECT "round" FROM table_203_371 WHERE "round" > 3 ORDER BY "round" LIMIT 1
SELECT "round" FROM "table_203_371" WHERE "round" > 3 ORDER BY "round" NULLS FIRST LIMIT 1