Show missing records

[Luke Vader]

I know there's a way to do this, by unsure how:
Table A- 5 records (items in example)
Table B- 2 records of 5 from Table A (backorders)

I need a query that returns the 3 records in Table A that are not in Table B.

I've tried the following, but not showing the desired results.

SELECT
`items`.`QUANTB`,
`items`.`ITEM_ID`,
`backorders`.`lineID`
FROM
`backorders`
INNER JOIN `items` ON (`backorders`.`lineID` <> `items`.`ITEM_ID`)
WHERE
(`items`.`QUANTB` > 0)
group by
`items`.`ITEM_ID`

That's it
Thanks