Covid-19: information on Slovenia's entry restrictions during the coronavirus epidemic
There are currently temporary travel restrictions on non-essential travel for citizens/residents of certain third countries, including Israel, at the external borders of Schengen Member States, meaning that only certain categories of travellers could be authorised for entry. Exemptions from restrictions on travel to the EU/Schengen are listed here: https://ec.europa.eu/info/live-work-travel-eu/coronavirus-response/travel-during-coronavirus-pandemic_en
Israel is on Slovenia's Red list of countries. People entering the Republic of Slovenia, who are a resident of a country on the red list or who arrive from that country, shall be required to stay in quarantine for a period of ten (10) days. Upon entry into Slovenia, they will have to provide an address where they will stay in quarantine, which has to fulfil requirements of the Recommendation of the National Institute of Public Health regarding accommodation premises for quarantining.
However, a person will not be required to quarantine if, on crossing the border, they submit a negative PCR test, which must not be older than 48 hours after taking the swab and was performed by an organisation or sole trader that has been recognised as appropriate and credible by the Institute of Microbiology and Immunology and the National Laboratory of Health, Environment and Food (https://www.nlzoh.si/en/objave/priznavanje-rezultatov-testiranj-na-prisotnost-virusa-sars-cov-2-pri-prehajanju-meja/).
Foreigners who enter Slovenia must comply with the regulations that temporarily restrict the movement and gathering of people in order to prevent the spread of infection within the country (restriction of movement between municipalities with certain exceptions for which proof is required; restriction of movement between 21:00 and 6:00, etc.). You can see the list of restrictions here: https://www.gov.si/en/topics/coronavirus-disease-covid-19/measures-to-contain-the-spread-of-covid-19-infections/