There seems to be some confusion between "Top Boy" seasons because of the show's history of airing on Channel 4 and later being revived by Netflix. To clarify:

• The original "Top Boy" seasons 1 and 2 aired on Channel 4 (2011 and 2013) and are now known on Netflix as "Top Boy: Summerhouse."
• Netflix revived the show with a new cast and crew, labeling their first season as "Top Boy" season 1, which is technically the third overall season.
• Following this, Netflix released seasons 2 and 3, which are seasons 4 and 5 overall in the show's chronology.

The latest and final season, which is labeled as "Top Boy" season 3 on Netflix (the fifth season overall), was released on September 7, 2023. This season has six episodes and concludes the series.

So, "Top Boy" season 3 (Netflix's third season) came out on September 7, 2023.