CREATE TABLE table_15653 ("Date" CLOB, "Round" CLOB, "Opponents" CLOB, "Result F\\u2013A" CLOB, "Attendance" FLOAT)

Name the sum of attendance for round 3
SELECT SUM("Attendance") FROM table_15653 WHERE "Round" = 'round 3'
SELECT SUM("Attendance") FROM "table_15653" WHERE "Round" = 'round 3'