Absent aggravating or mitigating circumstances, upon application of the factors set out in Standard 3.0, the following discipline is generally appropriate in cases involving a failure to act with reasonable diligence and promptness in representing a client:
4.41. Disbarment is generally appropriate when:
(a) A lawyer abandons the practice and causes serious or potentially serious injury to a client; or
(b) A lawyer knowingly fails to perform services for a client and causes serious or potentially serious injury to a client; or
(c) A lawyer engages in a pattern of neglect with respect to client matters and causes serious or potentially serious injury to a client.
4.42. Suspension is generally appropriate when:
(a) A lawyer knowingly fails to perform services for a client and causes injury or potential injury to a client; or
(b) A lawyer engages in a pattern of neglect and causes injury or potential injury to a client.
4.43. Public reprimand is generally appropriate when a lawyer willfully neglects a legal matter entrusted to him and causes injury or potential injury to a client.
4.44. Private reprimand is generally appropriate when a lawyer willfully neglects a legal matter entrusted to him and causes injury or potential injury to a client.
Ala. S. Att'y Discip., SECTION II, C, Standard 4.0, Standard 4.4