The 2023 FIVB Men's Volleyball Nations League was the fifth edition of the FIVB Men's Volleyball Nations League, an annual men's international volleyball tournament. The competition was held from 6 June to 23 July 2023, with the final round taking place at the Ergo Arena, Gdaà Âsk, Poland.
Following the results of 2022 Nations League and 2022 Challenger Cup, Australia were replaced by debutants Cuba in this edition.
Finals host and home team Poland won their first VNL title after defeating the United States in four sets. It was the United States' third silver medal. Japan defeated Italy in a tie-breaker match and claimed the bronze medal. Paweà  Zatorski from Poland was named the MVP of the tournament.
Sixteen teams qualified for the competition. Ten of them qualified as core teams which cannot face relegation. Other six teams were selected as challenger teams which could be relegated from the tournament. Cuba replaced Australia after winning the 2022 Challenger Cup.
The format of play is the same as edition 2022. The new format will see 16 men's teams competing in pools of 8 teams during the pool phase. Each team plays 12 matches during the pool stage. Eight teams will then move into the final knockout phase of the competition.
The VNL Finals will see the top eight teams moving directly to the knockout phase which will consist of eight matches in total: four quarterfinals, two semi-finals and the bronze and gold medal matches.
Final 8 direct elimination formula:
The overview of pools was released on 11 November 2022.
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<section begin="2023 VNL F8" /><section end="2023 VNL F8" />
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<small>Statistics leaders correct at the end of preliminary round.</small>
<small>Statistics leaders correct at the end of final round.</small>
After the announcement of the host venues and the games schedule, the president of the Iranian Volleyball Federation sent a letter to the FIVB expressing their concerns about the fact that the Iranian team is scheduled to play their games on the third week of the VNL in the USA territory. They stated that five members of the Iranian national team required further examination and additional documentation for visa issuance. The Iranian authorities also expressed their desire to host the USA's leg instead, or they might boycott the leg by not sending anyone to the USA.
The passports of the Iranian national team members were resubmitted to the US Embassy in Ankara, Turkey for a visa issuance. After necessary checks, visas were issued for the 12 players, with only four days left until the start of Week 3 of the VNL. However, five players including Amin Esmaeilnezhad were not granted visas. This situation also happened with the coach of the Iranian national team, Behrouz Ataei, who presented an incomplete documentation. After the second week round in Rotterdam, Netherlands, the rejected five players had to return to Tehran.
After failed negotiations with the American authorities, the FIVB Executive Committee specifically examined the question of the visas for the Iranian team and approved an unprecedented decision. If the United States government does not issue the visas to the key members of the Iranian team, the points of Iran and its opponents in the third week of the games would not be accounted for on the world rankings, but the results of these games would count exclusively for the tournament.