When the Samsung j5 will get the Marshmallow (Android M 6.0) update?

no.only flagships will receive the 6.0 update.

this is the official list of devices that will be upgraded to 6.0 by samsung

Model name Model code Provider

Galaxy S5 SM-G900F EUR OPEN

Galaxy S5 SM-G900V VERIZON

Galaxy S5 SM-G900H EUR OPEN

Galaxy S5 SM-G900FD

Galaxy S5 LTE-A SM-G901F EUR OPEN

Galaxy S5 neo SM-G903F EUR OPEN

Galaxy S5 LTE-A SM-G906L LG U+

Galaxy S6 SM-G920FD

Galaxy S6 SM-G920F EUR OPEN

Galaxy S6 SM-G920D NTT DOCOMO

Galaxy S6 SM-G920T T-MOBILE

Galaxy S6 SM-G920D NTT DOCOMO

Galaxy S6 SM-G920A AT&T

Galaxy S6 SM-G920P SPRINT

Galaxy S6 SM-G920V VERIZON

Galaxy S6 SM-G920I

Galaxy S6 SM-G920R4 US CELLULAR

Galaxy S6 SM-G920AZ CRICKET

Galaxy S6 SM-G920R7

Galaxy S6 SM-G920T1 T-MOBILE

Galaxy S6 SM-G920R6

Galaxy S6 SM-G920W8 BELL MOBILITY

Galaxy S6 SM-G920S SKT

Galaxy S6 SM-G920K KT

Galaxy S6 SM-G920L LG U+

Galaxy S6 edge SM-G9250 CHINA

Galaxy S6 edge SM-G925F EUR OPEN

Galaxy S6 edge SM-G925I

Galaxy S6 edge SM-G925Z SOFTBANK MOBILE

Galaxy S6 edge SM-G925D NTT DOCOMO

Galaxy S6 edge SM-G925J KDDI

Galaxy S6 edge SM-G925T T-MOBILE

Galaxy S6 edge SM-G925A AT&T

Galaxy S6 edge SM-G925P SPRINT

Galaxy S6 edge SM-G925R4 US CELLULAR

Galaxy S6 edge SM-G925R6

Galaxy S6 edge SM-G925W8 BELL

Galaxy S6 edge SM-G925R7

Galaxy S6 edge SM-G925V VERIZON

Galaxy S6 edge SM-G925K KT

Galaxy S6 edge SM-G925S SKT

Galaxy S6 edge SM-G925L LG U+

Galaxy S6 edge + SM-G928A AT&T

Galaxy S6 edge + SM-G928P SPRINT

Galaxy S6 edge + SM-G928R4 US CELLULAR

Galaxy S6 edge + SM-G928F EUR OPEN

Galaxy S6 edge + SM-G928V VERIZON

Galaxy S6 edge + SM-G928T T-MOBILE

Galaxy S6 edge + SM-G9287C

Galaxy S6 edge + SM-G928I

Galaxy S6 edge + SM-G928C

Galaxy Note 4 SM-N910V VERIZON

Galaxy Note 4 SM-N910F EUR OPEN

Galaxy Note Edge SM-N915V VERIZON

Galaxy Note 5 SM-N920C

Galaxy Note 5 SM-N920V VERIZON

Galaxy Note 5 SM-N920R4 US CELLULAR

Galaxy Note 5 SM-N920P SPRINT

Galaxy Note 5 SM-N920A AT&T

Galaxy Note 5 SM-N920T T-MOBILE

Galaxy Note 5 SM-N9208

Galaxy Note 5 SM-N920C

Galaxy Note 5 SM-N920I