Mero bhai ko bihe bhaekole Nepal jana parne sthiti aayo. Advance parole aauna 2-4 month lagdo raichha. Expedited Advance Parole apply garna kasto document chainchha. Kasailai anubhav chha bhane share garau

You need to get a letter from a doctor in Nepal that should mention that there is some medical emergency that your immediate family member has and you need to be there for that. This is my personal experience. I got my AP from the field office in couple of hours.

like what @Gmajor said, but you need to verify the relationship as well. If it is in your birth certificate ( dad/mom or granddad/grandmom ) , you can show birth certificate to verify relationship . Otherwise, you can show relationship-verification certificate that your municipality can provide. This is also from my personal experience for advanced parole based on i-485.

Thanks @GMajor @paani_ma_paade_jasto. i will try the same

One more thing, you if apply for an emergency parole, that would be valid upon the officer's discretion and that might be valid only for a Single or multiple entires. My AP was only valid for 45 days and it was for a single entry only.

I will be happy with 30 days and single entry as well.
By the way should the letter include my name.

Yes and your relationship with that person.

@imjagat, the doctor doesn’t need to list the medications or even recommend for you to go, but it is important to include his name, the hospital’s or clinic’s name, and where. Doctor must mention the name of your relative and his or her condition.

To Whom it May Concern:

I am Doctor Hari Prasad and I am a practitioner at Bir Hospital In Kathmandu,Nepal.  My patient Ram Maya Kumari has been under my care since January 2017 up to the present day.  Ms. Kumari has the following conditions:

1. Diabetes
2. High Blood Pressure
3. Depression
4. Rheumatoid Arthritis

 

Under my discretion Ram Maya Kumari is taking the following preskription medicines:

1. Glyxambi Oral
2. Amiloride
3. Celexa
4. Methotrexate

 

It is recommended that her son Imjagat Kuikal takes care of her ailments and mental health for a better quality of life for at least the duration of January 15 to March 15.

Thank you,

 

Doctor Hari Parsad. 

Also write another letter, 

Sample

To Whom it May Concern:

My name is Imjagat Kuikal and I am requesting an Advance Parole document (i-131) to see my 70 year old Mother Ram Maya Kumari, she has Diabetes, High Blood Pressure, and Rheumatoid Arthritis.  For the past few years she has been visiting Dr. Hari Prasad at Bir Hospital in Kathmandu, Nepal.  I would like to take care of my mother for 90 days starting January 15 to March 15.  My mother Ram Maya Kumari is old and with all her health complications I would like to take ease her pain and assist her in any way.  In addition, she is an older person, therefore, there is a possibility that she will not be with us for long, and I would like to at least assist her while she is present.  

I am enclosing the following documents:

• Money order (or check) for the Advance Parole Document for the U.S Department of Homeland Security
• Form I-131 travel document
• 2 passport photographs
• Copy of my passport
• Copy of my employment card given by USCIS with my TPS application
• Copy of my I-797, notice of action, for my I-821
• 1 letter from Dr. Hari Prasad
• Copy of my birth certificate
• Copy of my mother’s birth certificate 
• Copy of relationship certificate
• G-1145 form

Kindly approve my application for Advance Parole

Thank you very much,

Imjagat Kuikal

Thanks @halfkattu