{{Infobox version
| title = Minecraft 1.21.3
| image = 1.21.3 banner.jpg
| image2 = Java Edition 1.21.3.png
| edition = Java
| vernum = 1.21.3
| date = October 23, 2024
| jsonhash = 1a5238463848865b057a167442ef88b4075f17cc
| clienthash = 6f67d19b4467240639cb2c368ffd4b94ba889705
| clientmap = 42c2292dfc21de314dee5205760332c807cad411
| serverhash = 45810d238246d90e811d896f87b14695b7fb6839
| servermap = c70e10f72ea65bb97e156143fd97c852dc958325
| prevparent = 1.21
| prev = 1.21.2
| next = 1.21.4
| nextparent = 
}}

'''1.21.3''' is a minor hotfix update to {{JE}}, released on October 23, 2024,<ref>{{Mcnet|minecraft-java-edition-1-21-3|Minecraft Java Edition 1.21.3|October 23, 2024}}</ref> which fixes critical bugs related to joining Realms with resource packs and a bug related to [[salmon]] size. It is compatible with [[Java Edition 1.21.2|1.21.2]] servers.

== Changes ==
=== Mobs ===
; [[Salmon]]
* Any small salmon from previous versions, including [[Java Edition 1.21.2|1.21.2]], are upgraded to their medium variants.

== Fixes ==
{{fixes|fixedin=1.21.3
|;From 1.21.2
|277779|Salmon from 1.21.1 or before shrink when updating to 1.21.2.
|277791|Attempting to join a Realm with a Resource Pack enabled fails with an error.
}}

== Trivia ==
* 1.21.3 is the first version since [[Java Edition 1.16.1|1.16.1]] to not have had any development versions released.

== Video ==
{{slicedlime|nzpF-5GqyD8}}

== References ==
{{Reflist}}

== Navigation ==
{{Navbox Java Edition versions|1.2x}}

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