When I right click to open attribute table my arcGIS 10.3 crash.What should I do to prevent this?
If it does it for all tables in all projects, then you have an installation problem and a reinstall might be in order. If it is just with a particular data set, try a new project, use the backup file and run everything from a new folder location and a new geodatabase if needed. Often a reboot and a judicious cleanup of temporary folders works wonders as well.
If you have any further information on your work environment, that would help. And if any of the files are on a server... start there.
Also check Fixing ArcMap crashes
Retrieving data ...