The embassy said violators could be subject to a fine of 500,000 UAE dirhams or about Bt5 million and/or a jail term from three years to 15 years. Gaza's Hamas rulers, which receive Qatari aid, have said Saudi Arabia's call for Qatar to cut ties with the Palestinian militant group is "regrettable" and said it contradicts traditional Arab support for the Palestinian cause.
Saudi Arabia, the UAE, Egypt and Bahrain all cut off diplomatic contact with Qatar on Monday morning, after officially accusing it of "sponsoring terrorism".
Meanwhile, Qatar's Foreign Minister Sheikh Mohammed bin Abdulrahman Al Thani Qatar will never surrender to the pressure being applied by its Arab neighbours and won't change its independent foreign policy to resolve disputes that have put the region on edge.
Qatar vehemently denies any such backing.
Anwar Gargash, the United Arab Emirates' foreign affairs minister, said in an interview that Qatar has "chosen to ride the tiger of extremism and terrorism" and needs to pay the price, despite Qatar long denying the allegation.
Speaking in Germany, Adel al-Jubeir said he is seeking a response to those demands "soon".
The UAE Minister of State added that Qatar has also to finish "its support of Muslim Brotherhood and it has to forbid all religious figures using Mosques and religious institutions as platforms to incite against GCC countries".
Al Khalifa recounted the mistakes Qatar had made against Bahrain and said: "Since 20 or 21 years ago there has been a big prejudice against Bahrain".
The Kuwaiti emir also went to the UAE and Qatar Wednesday for more consultations. They were later joined by Libya, Yemen, the Maldives, Mauritius and Mauritania. Food imports are affected as Saudi Arabia closed its land border with Qatar, stranding thousands of trucks carrying supplies.
He also said Qatar's emir will not leave the country while it is "in blockade", so he can not attend an offered mediation by US President Donald Trump at the White House.
Translation - Emirati attorney general: Expressing Sympathy for Qatar on social media websites is a crime punishable by law. Qatar also hosts the largest US military base in the Middle East, which is the US Central Command's forward headquarters running all operations in the region, staffed by around 10,000 troops.
Mr Al Qassemi said: "The Qataris should not count on that base as being a guarantee of sort of American protection when it comes to conflict with Saudi Arabia".