The Zenit 3SLB or Zenit-3M was a Ukrainian expendable carrier rocket derived from the Zenit-2SB.

The Ukrainian space industry was highly integrated with that of Russia due to its Soviet heritage, but that cooperation was interrupted by the Russo-Ukrainian War beginning in 2014, which effectively led to a hiatus in the Zenit program.

[2] The subsequent Russian invasion of Ukraine in 2022 saw damage to its manufacturing facilities due to Russian missile strikes, and what survived those strikes pivoted to producing military weapons.

It consisted of a Zenit 2SB (Zenit-2M) core vehicle, with a Block DM-SLB upper stage by RSC Energia (Russia).

The rocket's fairing was developed by Lavochkin (Khimki, Moscow, Russia).