Editing World B-3

{{image|more=yes|Base game}}
{{distinguish|Level B-3}}
{{level infobox
|title=World B-3
|image=[[File:SMAS LL World B-3 Screenshot.png]]
|code=World B-3
|world=[[World B]]
|game=''[[Super Mario Bros.: The Lost Levels]]''
|limit=300 seconds
|before_alt=
|before=[[World B-2|<<]]
|after=[[World B-4|>>]]
|secret=
}}
'''World B-3''' is the third level of [[World B]] in ''[[Super Mario Bros.: The Lost Levels]]'' and the eleventh secret level overall in said game. It is the only athletic level in the game where the time limit is 300 seconds instead of the usual 400.

==Layout==
This level consists of several scattered platforms with [[Koopa Paratroopa]]s between them. After the first [[scale]] lift platforms are four [[lift]]s, two that drop and two that move horizontally, and above the second lift is a [[? Block]] with a power-up. Past the first [[Super Spring]] are small platforms followed by pipes with [[Piranha Plant]]s, and [[Bullet Bill]]s will begin firing from the right after the second Super Spring. In the group of [[Brick Block]]s ahead, the one on the right holds a power-up, though not in the ''[[Super Mario All-Stars]]'' version of the game. After another Super Spring and a scale lift are platforms with large gaps between them; in order to cross the first gap, the player has to time a jump off of a Koopa Paratroopa. After the platform with the [[Koopa Troopa]] is the [[Goal Pole]].

In ''All-Stars'', the uncommon green Super Springs are replaced with ordinary red [[Springboard]]s.

==Enemies==
{{Number of enemies
|image1=[[File:SMB Red Koopa Paratroopa Sprite.gif]]
|name1=[[Koopa Paratroopa|Red Koopa Paratroopa]]
|count1=3
|image2=[[File:SMB Green Koopa Paratroopa Sprite.gif]]
|name2=Green Koopa Paratroopa
|count2=2
|image3=[[File:SMBLL Red Piranha Plant.png]]
|name3=[[Piranha Plant|Red Piranha Plant]]
|count3=2
|image4=[[File:Bullet Bill Super Mario Bros.png]]
|name4=[[Bullet Bill]]
|count4=(infinitely spawned offscreen from the right right after the second Super Spring)
|image5=[[File:SMB Red Koopa Troopa.gif]]
|name5=[[Koopa Troopa|Red Koopa Troopa]]
|count5=1
}}

==Items==
[[File:SMAS LL World B-3 Title Card.png|thumb|Course icon]]
{{Item locations
|image1=[[File:SMBCoin.gif]]
|name1=[[Coin]]
|count1=10
|notes1=All the coins are in open air.
|image2=[[File:SMBLL Super Mushroom Sprite.png]][[File:Fire Flower SMB.gif]]
|name2=[[Super Mushroom|Mushroom]]/[[Fire Flower]]
|count2=2
|notes2=
}}

==Level maps==
{{Wide image|NES LL World B-3 Map.png|3392|Map of World B-3}}
{{Wide image|SMAS LL World B-3 Map.png|3664|Map of World B-3 (''[[Super Mario All-Stars]]'' version)}}

{{SMBTLL levels}}
[[Category:Sky areas]]
[[Category:Super Mario Bros.: The Lost Levels levels]]