Wikipedia:Articles for deletion/Mars 3
While there may be lots of unsourced content in the article, unsourced content is not a reason to delete; |AfD is not for cleanup. Also interplanetary spacecraft are as close to "automatically notable" as anything. Also have you looked for Russian-language sources
— User:The, 09:21, 23 August 2012 (UTC)
Stance: keep
Cited policy: WP:NOTCLEANUP (Wikipedia:Arguments to avoid in deletion discussions)