heartrending (adj.)

• affecting
• afflictive
• agonizing
• calamitous
• consuming
• dire
• distressing
• doleful
• excruciating
• grievous
• harrowing
• heartbreaking
• lamentable
• moving
• pathetic
• piteous
• pitiable
• pitiful
• racking
• regrettable
• rending
• torturous
• touching
• unfortunate