Twelve teams from nine countries (Belarus, Croatia, North Macedonia, Serbia, Slovakia, Hungary, Ukraine, Russia and China were participating in this year's competition.

The culmination of the season, the SEHA Final 4, continues in its existing format, with the four top teams from the competition competing for the title over one weekend.

The SEHA – Gazprom League Executive Committee made decision that 12 participants will play in two groups in the upcoming season.

Telekom Veszprem, Motor Zaporizhzhia, Eurofarm Pelister, Metaloplastika Sabac, HC Spartak Moscow and Beijing Sport University are the new clubs that will join the 9th SEHA – Gazprom League season.

Following is the list of clubs competing in 2019–20 SEHA League, with their manager, team captain, kit manufacturer and shirt sponsor.

The SEHA - Gazprom League Executive Committee had made the decision for the final four tournament to be held at the Krešimir Ćosić Hall in Zadar, Croatia, on 3 and 5 April 2020.

[17] Due to the current situation in the spread of COVID-19 across Europe and further objective reasons, SEHA Executive Committee has made a decision to postpone the Final 4 indefinitely.

[18] On 11 August 2020 the SEHA - Gazprom League Executive Committee announced the decision for the final four tournament to be held at the Krešimir Ćosić Hall in Zadar, Croatia, on 4 and 6 September 2020.