The ECCB International Netball Series, also known as the OECS International Netball Series, is an international netball series organised by the Caribbean Netball Association. It features national netball teams from countries that are also members of the Eastern Caribbean Central Bank and/or Organisation of Eastern Caribbean States. The ECCB members play a series of test matches against each other. The winners are awarded the Gloria Ballantyne Championship Trophy. Grenada won the inaugural 2019 series and together with Saint Vincent and the Grenadines have been the series' most successful teams. The series has also featured guest national teams, usually other members of the Caribbean Netball Association, who play for World Netball Rankings points.
Between the 1991 to 2018, the Caribbean Netball Association organised an ECCB/OECS Under-23 Netball tournament with the Eastern Caribbean Central Bank as its title sponsor. Saint Vincent and the Grenadines had won this tournament 14 times. Grenada and Saint Lucia won six titles each and Saint Kitts two. In June 2019, the under-23 tournament was replaced by the ECCB International Netball Series which would feature senior teams playing for valuable World Netball Rankings points. The winners of the new series would be awarded the Gloria Ballantyne Championship Trophy. Ballantyne was a former Saint Vincent and the Grenadines Netball Association and Caribbean Netball Association president, an administrator, umpire and Saint Vincent and the Grenadines captain and head coach. She passed away in June 2019. Saint Vincent and the Grenadines hosted the inaugural 2019 series which was won by Grenada.