Career
Marin began his career at the Spartak Plovdiv academy but moved to Botev Plovdiv along with Radoslav Terziev, Lachezar Angelov and Rosen Andonov in January 2012. Botev Plovdiv
= 2014-2015 season A week later he played again 90 minutes and made a solid performance during the 1-0 loss from Ludogorets Razgrad. He came on as a substitute for Momchil Tsvetanov and played on the atypical for him position of a left midfielder.
A week later, on 22 March, Marin again came on as a substitute and again played on the same position during the 0-0 draw with Ludogorets Razgrad.
On 18 April Lazar Marin was included in the starting lineup for the 1-1 draw with Beroe Stara Zagora. He played well but was replaced on the half time due to an injury.
On 3 May 2015 Marin came on a substitute and made an assist for the goal of Tomáš Jirsák during the 1-3 defeat from Ludogorets Razgrad. Soon after Petar Penchev decided to use Lazar Marin in more attaching role he scored his first goal in A grupa.
In the same game Marin also provided an assist to Ivan Tsvetkov.
A week later, on 23 May, Marin scored again but this time Botev Plovdiv lost with 1-2 the away game versus Beroe Stara Zagora. = 2015-2016 season Lazar Marin established as a regular first team player for Botev Plovdiv during 2015-2016 season. He participated in all of the first 10 matches in A Grupa and received 5 yellow cards.
He missed the 11th round due to a ban.
In the beginning of 2016, after the arrival of Ihor Oshchypko, Marin lost his regular place in the starting line-up. On 6 March, he came on as a substitute during the 1-1 away draw with Beroe Stara Zagora.
On 31 March 2015 Marin played for Bulgaria U21 during the 1-3 away defeat of from Wales U21.