Teenage forward who made his senior debut for Walsall in a 1-0 defeat at Bradford in April 2017.
The youngster played five games for the first-team in 2016/17, with his full debut coming in the final-day reverse by MK Dons.
He also helped the Saddlers' Development Squad win the Walsall Senior Cup, scoring a brace in the 4-3 semi-final victory over Wolverhampton Casuals.
For the U18s, Candlin netted seven goals in 19 league and cup outings, including a hat-trick in a 3-2 away win at Carlisle.
He signed his first professional contract in August 2017 and featured on four occasions for the senior side last season.